Porper, Titan, Fibre, LBM, Saber-T, Ivory, MasonH's new yellow Micarta, G10, black and brown phenolic, Juma, and MPI. That's just what I stock. There are many more types.
Differences are all across the board, hardness, color, weight, how it cleans up, does it resist chalk, ect.
I would ask a more detailed question if you have one, as it's hard to speculate what you're wondering about. Below I will describe a few that I use.
New Yellow Micarta - This is my favorite, lighweight, a nice medium hard hit, only downside (to some people) is the light yellow color, otherwise this stuff is the nuts, IMO.
LBM - The stuff I currently have is not a real bright white, but still white enough. It hits hard, stays fairly clean, heavy, and has held up good.
Titan - Bright white, lightweight, have had a few crack, soft hit. Stock this mainly for predator repairs that aren't covered under warrenty. It's decent.
Juma - Ivory colored, medium/medium soft hit, polishs real nice. I like the hit of this, seems to be a medium weight. I've only installed a few of these on cues I built. The color turns some people off (everyone around here wants bright white). Hits nice.
Porper - My most installed ferrule. Bright white, polishs decent, holds up well, nice medium hit.
I get a lot of the cheaper cues in with crap ferrules, so that is why the Porper is my most installed. On the better cues I replace with the same kind of material that was on there, unless the owner requests something different.
On my cues, I tend to go with the micarta, but use different materials based on what my customer is looking for hit wise, or if they can't stand the yellow color. In those cases, I normally go to the Porper.
This is just my opinion on the materials, I'm a rookie compared to most of these guys, so take it however you'd like.
