I had the Fender 810 speaker cabinet and the Super Bassman ( Still have the Super Bassman ), the Fender 810 Neo, is a really nice sounding cabinet, it is ported ( 4 separate chambers ), it can sound like a Ampeg sealed 810, ( since I don't own a Ampeg 810 anymore, my comparison, is using a Berg NV610, as the sound, is very close approximation of a Ampeg 810 ). A nice thing about the Fender 810, is that they have handles on the bottom, so 2 people can lift the cabinet up, stairs/ tall stages, as to the volume, it can get loud, and I mean louder, than what you'll ever need, I also used, when I owned, a SVT Classic, with the Fender 810 cabinet, the cab sounded nice with the SVT, also used a Fender Bassman 800, with the Fender 810, that amp, also sounded great with that cab, also used my Mesa Boogie Subway 800+, again, it sounded good, the cab has a certian tightnes to it, can't explain it, but that tightness, has a good quality to it,
I no longer own the 810, as my needs don't require, that big of a speaker cabinet, and it sat, more than, i used it, sold it to a local Backline company, along with the SVT-CL & the Bassman 800, kept the Super Bassman, as it can cop the SVT sound, and it is a really good amp, still have the Berg 610, I will say, the Fender 610, most likely sounds like the 810, but I can't say, as I haven't played throught one yet
If you have the need for a big rig, get it, you won't be disappointed, just make sure you have the ability to transport it, and get a road case for the Bassman head ... just my opinion