For me the pricing model is highly attractive. With Enhance we cut per-server software/licensing costs in half.
Native containerization is also a great benefit.
Disaster Recovery via the backup server role and features is also a big benefit. Other panels make backups as an after thought, while Enhance really put some good work behind their offering. It has taken a long time to get the old backups system working perfectly, and it still is missing a lot of basic features (download backups, etc), but it had high hopes. The new backup system scares me because of all the reported issues and change in strategy.
The only thing for DR that was really lacking (and extremely important) was a way to restore the control panel server. So hopefully that feature gets added soon, then DR will be rock solid / unbeatable in the hosting panel world.
The central control panel is also a big part that sets Enhance apart. Instead of needing a different URL for clients to login to for every server, we get 1 unified login that gives access to all clients. That's gives Enhance a really premium feel compared to the old style panels.
There's more, but this is probably my top 4. Price, DR, containerization, central control panel.