#1
I was wondering what makes playing modes different than playing from the scale that their based on.

For example, why say you were playing an F Lydian or D Dorian when they use the same notes as C Major?
#2
The tonal center is different. If you are playing in the key of C major, your tonal center is C. If you are playing F lydian, the tonal center is F.
#3
^exactly, if you wanted a tune based in F but wanted B natural you can just say F lydian
#4
Delete this thread and read the sticky.
Someones knowledge of guitar companies spelling determines what amps you can own. Really smart people can own things like Framus because they sound like they might be spelled with a "y" but they aren't.