I own a few Mezz cues that I have alternated playing with using the same shaft: one is SS joint with linen wrap, one is SS joint and wrapless, one is SS joint with a heavily textured leather wrap, and one is a wood joint with a smooth leather wrap. My favorite shaft is a WD700 with a sniper tip.
From my experience, the weight and balance of the butt might make a marginal difference in the way the balls react, but the weights are so close to each other that I haven't noticed. The noticeable differences between butts while I'm playing are the wrap and the joint. The feel of the feedback from the cue between SS and a wood joint is very different, and the wrap can affect whether the cue slips in your hand or not during your stroke. I don't think that the feedback affects the performance of the cue at all, but the wrap may cause you to change your stroke/grip. In my case, I prefer the tackiness of a wrapless or leather wrap to linen, so when I shoot with the linen-wrapped cue, I have a tendency to tighten my grip when I feel it slipping.
From my experience, the weight and balance of the butt might make a marginal difference in the way the balls react, but the weights are so close to each other that I haven't noticed. The noticeable differences between butts while I'm playing are the wrap and the joint. The feel of the feedback from the cue between SS and a wood joint is very different, and the wrap can affect whether the cue slips in your hand or not during your stroke. I don't think that the feedback affects the performance of the cue at all, but the wrap may cause you to change your stroke/grip. In my case, I prefer the tackiness of a wrapless or leather wrap to linen, so when I shoot with the linen-wrapped cue, I have a tendency to tighten my grip when I feel it slipping.