I'm guessing that the only real differences to base your choice on would be...
1. Looks -- Is PC/HC your goal? If not, pick what you like.
2. Stability -- Do you use the extra weight for balance/ balast when shooting? Or is the weight a detriment (such as when hunting)? Go heavy or light depending on your shooting style.
3. Reliability -- Aluminum is easier to bend than solid brass, which is easier to bend than steel. And wood is easier to break than fiberglass/plastic. Are you rough or gentle with your rods?
** As for wear or build up on the rod or barrel, if you clean the gun and rod thouroughy, I don't imagine this will be a problem **
Personally (and this is just me), I think brass is sturdy enough, soft enough, hard enough, heavy enough, pretty enough, and maybe PC/HC enough for me. I likes 'em that way. :grin:
Just an opinion
Legion