The main reason why I stopped using Puffin was its inability to resize the flash. The sides would just get cropped off so if there was a critical button near the edge then I just couldn't press it. VPN Browser asks for a paid subscription to keep working, but that's reasonable for a working product. None of the other differences are deal breakers, but being able to fit/scroll the flash to a given screen size is essential.

Go look it up on an app market for iOS availability information.