Doing a new garage roof.

I noticed at Lowes that they have several different drip edges. Is
there supposed to be a different one for the rake than for the eaves?
Also, does the drip edge install right up against the sheathing? or
should there be a little bit of a gap. I have 5/8 sheathing and assume
standard 1" drip edge. The type F is the standard for eaves I think,
but this type B is a wrap around for the gable end from what I could
tell--kind of like a 90 degree wrap.

What is the standard practice?