It's really a users choice:
- The HubConnect implementation is the better choice if you have multiple hubs or want to bridge SmartThings and Hubitat
- The MakerAPI is for the people that don't live in a multiple hub environment or rather want to stick to "Built-In" apps. HubConnect still requires a community app to be installed and configured.
Again, it is a users choice. I have both running at the same time 
and the good news is that I don't see any slowdowns of my Hubitat anymore!
