Sooo you want him to buy you a CPU while he's there? Also, I can almost guarantee that just because people are buying Ryzen that every single game out there will not be optimized just for Ryzen.
Like the other guy said, they won't use too many cores for a while. Taking that into consideration, if they're close enough in price where you live, might as well go for the better performing one, which would be the i7.