I own two Neox 212T's, I really dig these cabs. Some complain of the hard/odd schlep design of these cabs. I went out and bought a inexpensive fold away cart to move them from my spare room (gear room) thru the house, to my garage where I keep my SUV backed up into garage. I lift the cab by the two top handles, put a knee into its' back and use the small caster wheels to roll into the rear cargo area, done.
I use the cart at gigs to move the cab into the stage area, then I might use the built in casters to move it around on stage. These cabs feel so light that I mostly just lift em by the handles and place em where they need to go. I don't feel these built in casters were designed to roll along at long distances. Plus I imagine they'd wear down on concrete or other hard surfaces in time. It was prolly meant as a design to avoid using a seperate cart but my cart just makes moving all my gear a breeze, so that works for me.
Oh and I really dig the tone of these cabs for my all my different bands of Tx blues-rock/Trad blues/New country/classic rock/funk n soul music. I own a few other cabs, 112, 210, 410 but I've started using the Neox 212T more since I got a STM-900 head, works real nice with my P-bass w/flats. I also use more modern basses and I only play 5 stringers and my GB's handles the lows very well.
Either of these cabs you may choose from your two choices are very good quality and tone. I tried the AE212T at a local store a few years ago and felt they were too aggressive for my tone, so I went with the GB's. But it was nice to be able to try them each out first. Good luck, keep us posted on your choice.