Cloudflare DNS takes longer to resolve over IPv6 than Google DNS (35ms vs 3 ms) in Chennai, India

DIdn’t find a similiar post so I’m making a new one.
My ISP is ACT fibernet. I have native IPv6 connectivity and IPv4 provided via CGN.
Both clouldflare and google DNS take ~35ms to resolve over IPv4. However when resolving over IPv6, clouldflare takes longer (35ms vs 3 ms)

Connection information



Traceroute to primary Cloudflare DNS over v6(1111):

[email protected]:~$ sudo traceroute -I6 2606:4700:4700::1111
traceroute to 2606:4700:4700::1111 (2606:4700:4700::1111), 30 hops max, 80 byte packets
 1  redacted (redacted)  1.406 ms  2.158 ms  2.175 ms
 2  2406:7400:b0::12 (2406:7400:b0::12)  5.104 ms  6.033 ms  7.232 ms
 3  2406:7400:b0::11 (2406:7400:b0::11)  7.229 ms  7.227 ms  7.225 ms
 4  2406:7400:b0::d (2406:7400:b0::d)  5.990 ms  5.988 ms  7.145 ms
 5  2403:0:200::35d (2403:0:200::35d)  4.978 ms  4.996 ms  5.898 ms
 6  2403::612 (2403::612)  5.915 ms  2.847 ms  3.838 ms
 7  ix-ae-4-2.tcore1.cxr-chennai.ipv6.as6453.net (2405:2000:ff10::9)  3.322 ms  3.531 ms  3.741 ms
 8  if-ae-13-2.tcore1.svw-singapore.ipv6.as6453.net (2405:2000:ff10::11)  35.627 ms  35.659 ms  35.659 ms
 9  if-ae-2-2.tcore2.svw-singapore.ipv6.as6453.net (2405:2000:ffa0:100::2)  36.776 ms  36.793 ms  36.792 ms
10  if-ae-20-2.tcore1.svq-singapore.ipv6.as6453.net (2405:2000:300::19)  36.788 ms  36.785 ms  36.784 ms
11  2001:5a0:1d00:100::ba (2001:5a0:1d00:100::ba)  42.573 ms  42.592 ms  42.563 ms
12  one.one.one.one (2606:4700:4700::1111)  35.877 ms  35.622 ms  35.469 ms

Traceroute to secondary Cloudflare DNS over v6(1001):

[email protected]:~$ sudo traceroute -I6 2606:4700:4700::1001
traceroute to 2606:4700:4700::1001 (2606:4700:4700::1001), 30 hops max, 80 byte packets
 1  redacted  2.418 ms  2.406 ms  2.405 ms
 2  2406:7400:b0::12 (2406:7400:b0::12)  46.193 ms  49.122 ms  49.153 ms
 3  2406:7400:b0::11 (2406:7400:b0::11)  6.625 ms  7.968 ms  7.977 ms
 4  2406:7400:b0::d (2406:7400:b0::d)  7.904 ms  7.950 ms  7.960 ms
 5  2403:0:200::35d (2403:0:200::35d)  5.615 ms  5.638 ms  5.650 ms
 6  2403::612 (2403::612)  5.639 ms  3.647 ms  3.604 ms
 7  ix-ae-4-2.tcore1.cxr-chennai.ipv6.as6453.net (2405:2000:ff10::9)  3.542 ms  3.696 ms  3.684 ms
 8  if-ae-13-2.tcore1.svw-singapore.ipv6.as6453.net (2405:2000:ff10::11)  35.672 ms  35.678 ms  36.828 ms
 9  if-ae-11-2.thar1.svq-singapore.ipv6.as6453.net (2405:2000:300:100::d)  35.660 ms  35.653 ms  36.809 ms
10  if-ae-7-2.tcore1.svq-singapore.ipv6.as6453.net (2405:2000:300::5)  36.801 ms  36.793 ms  36.785 ms
11  2001:5a0:1d00:100::ba (2001:5a0:1d00:100::ba)  37.908 ms  37.909 ms  36.109 ms
12  one.one.one.one (2606:4700:4700::1001)  35.023 ms  35.397 ms  34.058 ms


Traceroute to primary Google DNS over v6(8888):

[email protected]:~$ sudo traceroute -I6 2001:4860:4860::8888
traceroute to 2001:4860:4860::8888 (2001:4860:4860::8888), 30 hops max, 80 byte packets
 1  redacted  2.907 ms  2.898 ms  2.897 ms
 2  2406:7400:b0::12 (2406:7400:b0::12)  15.223 ms  15.726 ms  16.101 ms
 3  2406:7400:b0::11 (2406:7400:b0::11)  7.371 ms  7.381 ms  7.957 ms
 4  2406:7400:b0::d (2406:7400:b0::d)  37.193 ms  37.226 ms  37.229 ms
 5  2406:7400:b0::6 (2406:7400:b0::6)  7.359 ms  7.932 ms  7.938 ms
 6  2406:7400:b0::35 (2406:7400:b0::35)  6.173 ms  3.295 ms  3.278 ms
 7  2404:6800:8000:76::1:1 (2404:6800:8000:76::1:1)  3.925 ms  4.367 ms  4.355 ms
 8  2001:4860:0:1::948 (2001:4860:0:1::948)  4.842 ms  4.859 ms  6.289 ms
 9  2001:4860:0:e00::3 (2001:4860:0:e00::3)  6.335 ms  6.335 ms  6.332 ms
10  google-public-dns-a.google.com (2001:4860:4860::8888)  4.817 ms  6.277 ms  6.278 ms

Traceroute to Secondary Google DNS over v6(8844):

[email protected]:~$ sudo traceroute -I6 2001:4860:4860::8844
traceroute to 2001:4860:4860::8844 (2001:4860:4860::8844), 30 hops max, 80 byte packets
 1  redacted 4.019 ms  4.021 ms  4.020 ms
 2  2406:7400:b0::12 (2406:7400:b0::12)  5.037 ms  5.655 ms  6.246 ms
 3  2406:7400:b0::11 (2406:7400:b0::11)  7.858 ms  7.880 ms  7.890 ms
 4  2406:7400:b0::d (2406:7400:b0::d)  7.877 ms  7.877 ms  7.877 ms
 5  2406:7400:b0::6 (2406:7400:b0::6)  9.695 ms  9.718 ms  10.099 ms
 6  2406:7400:b0::35 (2406:7400:b0::35)  7.851 ms  3.443 ms  3.438 ms
 7  2404:6800:8000:2d::1:1 (2404:6800:8000:2d::1:1)  3.432 ms  4.417 ms  4.408 ms
 8  2001:4860:0:1::2d0c (2001:4860:0:1::2d0c)  4.401 ms  4.397 ms  4.394 ms
 9  2001:4860:0:1::a9d (2001:4860:0:1::a9d)  5.434 ms  5.434 ms  5.433 ms
10  2001:4860::c:4000:d474 (2001:4860::c:4000:d474)  38.676 ms  38.703 ms  38.703 ms
11  google-public-dns-b.google.com (2001:4860:4860::8844)  5.330 ms  5.358 ms  3.188 ms


[email protected]:~$ dig +short CHAOS TXT id.server @2606:4700:4700::1111
"SIN"
[email protected]:~$ dig +short CHAOS TXT id.server @2606:4700:4700::1001
"SIN"

[email protected]:~$ dig +tcp @2606:4700:4700::1111 id.server CH TXT

; <<>> DiG 9.11.4-3ubuntu5-Ubuntu <<>> +tcp @2606:4700:4700::1111 id.server CH TXT
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7775
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
;; QUESTION SECTION:
;id.server.                     CH      TXT

;; ANSWER SECTION:
id.server.              0       CH      TXT     "SIN"

;; Query time: 35 msec
;; SERVER: 2606:4700:4700::1111#53(2606:4700:4700::1111)
;; WHEN: Sun Nov 18 21:46:03 IST 2018
;; MSG SIZE  rcvd: 54

[email protected]:~$ dig +tcp @2606:4700:4700::1001 id.server CH TXT

; <<>> DiG 9.11.4-3ubuntu5-Ubuntu <<>> +tcp @2606:4700:4700::1001 id.server CH TXT
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42460
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
;; QUESTION SECTION:
;id.server.                     CH      TXT

;; ANSWER SECTION:
id.server.              0       CH      TXT     "SIN"

;; Query time: 35 msec
;; SERVER: 2606:4700:4700::1001#53(2606:4700:4700::1001)
;; WHEN: Sun Nov 18 21:46:47 IST 2018
;; MSG SIZE  rcvd: 54