I think you need to buy the orion
The 10 " orion I have had a brief look over compared to my
10 "gso seemed to have a better finish without doubt .
Straight out of the box the gso will work great , The rust on the tubes was a issue with the early ones many years back I believe , the powder coating seems very differant these days, the need to fine tune and what to fine tune is a personal thing imo which you will deal with in time on any scope you buy.
Aside some of the more difficult mods tube shortening and such the adjustments seem pretty minor and easily handled . Many probably wheel there dob in and out year in year out without ever bothering with changing anything until they have to , can't judge that
to harshly ,if they are happy and enjoying the night sky its all good
good luck with your choice