Wood and balance of a cue butt

Looking for a longer cue, I wrote, as suggested by someone on this forum, to someone from Scmelke.

They propose a real (REAL!) custom cue, since I can choose many many options.

Two questions:

1. One of the options is the type of wood. They say:
   'We could make this style cue butt in various woods in sneaky pete style cues, bocote rosewood, shedua, cocobola , ebony, in various cues with linen wraps, or cues featuring a 3rd exotic wood for a wrap.'
   
   Is there a better wood than another? What are the differences between these different woods? I am not intersted by a wrap (linnen or leather)

• Do you thik there is an optimal point of balance of a butt. I have two butts. The balance of the first one is situated here:
  
  39cm (15.5") 33cm (13")
  ===================/============ Shaft side
  
  and the balance of the other cue is situated here:
  
  33cm (13") 39cm (15.5")
  =============//=================== Shaft side
  
  I much more prefer the more forwarded balance of the first cue. Is it just personal preference or are there objective criterions?

Thanks,
Marc