What are the benefits of 'Enterprise' over 'public' plan?
In 'Public' plan GC Logs, Thread dumps are uploaded to public cloud. For certain enterprise, it's concern to upload production artifacts to public cloud. In 'Enterprise' plan, applications are privately installed and runs on your datacenter/local machine. Thus production artifacts will remain within your corporate firewall.
Unlimited API calls
'Enterprise' plan offers unlimited API calls, which you can use for production server monitoring, CI integration,...
As shown in the above table, in the 'Public' plan there are limits on the number of thread dump/GC logs that you can upload, number of API calls that you can make, size of the file that you can upload. Where as in 'Enterprise' plan there are no such limits. You have unlimited access.
In 'Public' plan, service requests are attended within 3 days. Only e-mail support is provided. In 'Enterprise plan' service requests are attended with in 24 hours. Both Email and Phone support are provided.