Forgot to answer your questions.
The main difference between 61 and 141 is that Part 61 is way more flexible than 141. 141 has to follow a certain lesson plan, and mainly academies use 141, but not always. I like part 61 better because it's more flexible and more enjoyable, because you can change the lessons around. I know for some ratings like the commercial license and Instrumnet, 61 requires more hours than 141.
I believe 141 is held to higher standards by the FAA with their paper work and training.
I know there are many more differences, and I know that Others will chime in. Goodluck with whichever you choose. /ubbthreads/images/graemlins/smile.gif