Potato, tomahto
But not quite...the important distinction is that it is the focal
length of the telescope that determines the maximum field of view, not the focal ratio. Whether it is fast or slow is irrelevant. Both an 8" Dob with 1200mm focal length (f/6) and a 100mm refractor with 1200mm focal length (f/12) will be capable of showing the same maximum FOV, yet one is faster and the other is slow
Also, the eyepiece
IS important as that is what brings the image to focus for our eyes
and the focal length of the eyepiece and telescope together determine the magnification (magnification = FL telescope / FL eyepiece). For all intents and purposes, an 8" Dob is just as capable at showing a decent planetary image as a similarly sized Mak, they just get there in different ways.
Sorry Ryan...of the 4 choices available, they only come from 2 sources, Skywatcher (and Saxon) and GSO (and Bintel)
to complicate it further, some of the Orion scopes are variations on optics from Synta (parent company of Skywatcher), so besides local rebranding of these, these are pretty much your choices in most places around the world. The exception (there always is one!) is any kind of custom built or boutique scope, but these would be much more expensive...
Anyhow, the best thing I can suggest is, if possible, get hands on with one or more of them to get a feel for them...either in a store or at a club or society or local meet.