@gericb I never did this, but here is a list of all features of both apps, I hope I’ve covered everything 
My personal suggestion would be to go with Varys, because this is “my” product I develop independently from anyone else and create new features for, while Tautulli is “just a remote” or mobile interface for the product of someone else. I hope that makes sense 
EDIT: I’ve moved the comparison table to a central place, you can now find it on features.varys-app.com!