you'll be just fine and i doubt you'll really notice much difference between the two. rocking a '28 up front and a '25 in back on
a mid-80's steel bike that doesn't have clearance for the '28 in back. thought it did. take it on the road and light dirt and it does just fine.
i do like to switch it up occasionally and swap the wheels with '23's from the other bike. the mid-80's bike feels like a new, racier bike at that point.