This webpage might give you a clearer understanding:
Anyway,
Prioritized IP Ranges: Enterprise customers get better traffic routing, it’s less likely for Enterprise customers to face routing issues compared to Business, Pro and Free.
Named solutions engineer support: A dedicated solutions engineer from Cloudflare will be able to support you throughout your Enterprise subscription, usually comes with better response time and personalized recommendations compared to typical Cloudflare Support.
25x reimbursement uptime SLA: in case of network or system failure within Cloudflare itself, they will compensate you 25x compared to what Business plan guarantees.
CNAME set-up compatibility: allows you to use Cloudflare without the need to switch nameservers - just use your existing nameservers and point the CNAME to Cloudflare for individual DNS record.