I've got a couple of 12 string acoustics - an Aria AW-75T and a Martin J12-15. Both completely different in terms of construction, tone and playability.
The Aria is cheap, always out in my living room on a stand, and a real strummer. Lovely shimmering top end and sounds very "musical". Even though it's laminate wood thorughout, it's just got something great about it. It's my Bon Jovi guitar - it does a great "Wanted - Dead or Alive" :D
The Martin is all mahogany (including the top) and has a really smokey sound. Very mellow, loads of mids and is great for picking out complex runs/arpeggios etc. Really low action makes it a doddle to play too. Sounds superb for "Wish You Were Here" and "Hotel California".
I never check the minute details of a guitar. If it sounds good, and feels good to play, then that's all I need. At that price, you can't really pick fault! If you get chance, try an Aria - they're great for the price. Mine was £175.