Never had the 670 but I did have a phone with a 660 and the performance was ok, solid enough, but it wasn't snappy. I recently switched to a s10e and there's a marked improvement, think it uses the 855. On a tablet maybe the bigger screen might be an issue. There isn't a material difference between the 660 and the 670, so that might be helpful
I doubt that prices will increase, on the contrary, there will be discounts soon, since no one is buying anything. The difference between these tablets is big, since the S6 has a flagship processor, and the S5e is a budget one, which does not compare to the premium in terms of performance. For games, Snapdragon 855 is better, it will last longer. Games are optimized for it, so the S6 is definitely the choice.
The ram especially makes a huge difference. Processors are only incremental these days, but having that much more ram can really speed things up and also allow you not to haveto do stuff like reboot to make hearthstone less laggy.
Right now I’m using and Nvidia shield which has done pretty well for the past few years but has a battery life that isn’t anything to write home about. I really like the look of the Huawei MatePad Pro but I heard that you can’t get the google play store on it so Idk how I would play hearthstone. My budget is around 700$ or less. https://jiofilocalhtml.runhttps://forpc.onl