This was something I was worried about when I moved to Android (had pretty much every iPhone since it launched up to the 6+) but it's actually mixed, some apps I used to use on my iPhone were slightly worse, some apps were better.
In-fact now I think about it, it's because Apps can be made "default" Signal as my messaging app, Outlook as my email app and so forth, the apps work properly.
Apps that were worse, the TomTom app, it went from quick and smooth to taking over a minute to load. I ended up just using Waze and Google Maps. Again, they can be made into default Apps making the actual App experience better.