They both played different roles. Gomes was the more creative player. Close, but I would give the edge to Gomes through ball ability. Gomes wasn't as good at dribbling past players though. Gomes had the ingredients (tight control when carrying), but that didn't always translate to his performances. Gomes was the better scorer. I actually have Gomes with the better first touch provided it was on the ground (most in game situations). Close though. And I actually have Isak as the consistently better of the two in tighter spaces when carrying the ball. Gomes was great at executing passes in tight spaces, no doubt about that. And Gomes did have his moments in tight areas, but that wasn't as consistent.
What's great is that unlike Gomes, he's getting more playing time in midfield. I quite liked Gomes at midfield, but wasn't given that chance at first team level, or anywhere really bar some youth matches.