Here's my experience and why I say it doesn't matter.
For years I rode my first 99 R6 with forks setup for a 150lbs rider and stock rear shock, I'm not nearly that light but I rode the wheels off it, it felt planted and I could lean the thing until the fairing scraped.
Then I bought another 99 R6 with forks set up for my weight and Penske rear setup for my weight too and I was no where near as comfortable on it as the first one and fought it for many track days to get it better but never like the first R6 I had.
Now I have a 04 R1 with stock suspension and got it dial in now and if I get my head out of my butt and ride it I'll be just fine and be scraping bodywork again.
It's a mental game, so it you feel 10 mm is going to effect the bike then by all means make the changes. After all you gotta be 110% comfortable on it, not me.