Not sure how the specs of a J7 compare against a J7 Prime?
I've had a J7 Prime for 3 weeks now. It's used purely as a Pogo playing device and nothing else, not even as a Phone.
When playing normally it's fine for to click and catch. Where it falls behind my iPhone 6s is when flicking through the appraisal system. It's struggles to go at the same rate and I deliberately have to go slower.
I suspect the lag issues I'm having with the Go Plus paired to it are partially the phone not just the Go Plus works better on iPhone than Android as they were originally designed for iPhone than adapteded to work with Android.