Since it's a no so far, I'll chime in. I have a 6.5" Tracker and a 4" Model 44. Sights are identical as far as I can tell, but I'm a lot more at ease with the 4". The 6.5" has a lot of weight I'm fighting to keep the front end up, plus target acquisition is a lot faster on the 4" radius for me.
Either of them scoped would be a non issue, as far as aquiring a target, and accuracy as far as I can tell.