Tugboat = Single & dual coils. Excellent flavor, very good vapor production. Deep
juice well so less dripping.
Tobh = Dual coils. Good flavor, Excellent vapor production. Shallower drip-well, so more dripping.
For looks, that's personal, but the tobh generally looks sexy on anything. The tugboat has some engravings and such that are a bit busy to my taste, but it performs so well that it's kind of like a relationship where someone's flaws become part of their charm. I have both, and the tobh is sexy, but the tugboat is what I end up using.