I'd pick the 3600 over the two, provided you don't have need for gaming and streaming simultaneously. That being said, what is your current system's specs and what sort of task are you looking at taxing, day to day?
Ryzen 3600 is better or at least similar to Ryzen 2700 in every aspect. At games, it's much better. Multithread apps and streaming, it's similar. You should choose Ryzen 3600.