Adobes are considered to be 'better' usually...cleaner and better kerfed..etc...but TTFs seem to be easier to handle, and for many purposes are hard to tell apart..(Adobe wants THEIR stuff to STAY their stuff, and makes a point of it)...there are periodic (illegal) postings of entire sets of Adobe (Type-1) fonts on alt.binaries.fonts, and mad scrambles to get them before they expire. Tsk!

Fonts seem to be like recepies, there is no end to the ways people try to present the basic ingredients...some are yummy, and some are just plain strange!