Someone on another forum made the claim that the spacing between cogs on a Shimano MTB cassette was "slightly" different than on their road cassettes. Fact or fiction? The reason I ask, of course, is that I have an 11-32 shimano 10 speed that I'm shifting with a 10 speed Campy Ergo/Shiftmate/Deore RD setup. Shifting is very good, but not quite what it should be. I have two "risk mitigation" plans, but I thought I'd check on the cog spacing first.