New engine and next gen mean absolutely nothing for both games when it comes to gameplay and AI.
Look at 20, the AI is actually worse than previous years (20 idiots on the pitch), because of a simple design choice (1v1 gameplay bs).
It just means prettier graphics. Perhaps. So I'm assuming the excitement for next gen is for a better looking game. If so, fair enough.
And if EA switches from their own in house engine and start paying royalties to another company (say epic for unreal), for no reason at all, I'LL EAT MY HAT. Not happening. 😄