I think Phil is still mostly potential and hasn’t really taken that next step up yet. He didn't play much football in his developing years and might just take him a few more years than someone who started playing regular first team football earlier than him. But I think he’ll become a fantastic player and already is at times now.
However, one thing I will say about Foden, that will be unpopular, is that I think he has got poor shooting technique. He closes his eyes and moves his head away from the ball. Watch Messi and Agüero as examples: their eyes were/are always fixed on the ball at the point of contact.
Go to 2:21 on this video to see what I mean:
He does this a lot. He even scored a lovely goal at Anfield doing almost the same thing, but it’s still poor technique.