Have you ever heard that a slight difference in front to rear gearing could actually be an advantage in off road? I had some guy claiming that a slight difference actually helped on slick surfaces and some rock conditions. I have never heard of such a thing but this guy was so convincing I just had to ask? He says he is running a 411 /410 combo to be honest I don't know that there would be enough difference to matter?
Never heard of a benefit but I do know that the ratio being within 1% is considered close enough to not cause breakage.