Not nearly enough difference at all to worry about I don't actually think it will make
Not much difference although I understand where your coming from ish. Front has wider arc rear has far less. I ran my 90 like that for years no trouble.
ill soon be running 4.7 rear diff and 4.75 front.
People run 2mm tread on the front and 12 mm tread on the rear that's more of an issue and its designed to take that than what were doing.