Hey guys well ive decided to take the plunge and get a decent scope

i have decide on either the skywatcher 10 inch for $799 or the gso 12 inch for $899. can anyone please give me some pros/cons of each model?
im kinda leaning toward the 12 inch as for $100 more i get 2 more inches of aperture and it also comes with the crayford focuser which i dont really know what it is but ive read its better. plus 12 inch just sounds better
also im coming from a 5 inch celestron powerseeker so will the difference be HUGE or just a nice improvement. last night i could just make out some bands around jupiter(and i mean just) with my 20mm ep,what would it look like through the 10/12inch with the same eyepeice?
thanks for your help.