I used it and its predecessor (7038) extensively for well over 1,000 DAT transcriptions in 2017-18 for a radio station. Its a friggin beast (50 lbs+), and a solid machine, much more than one needs for simple transcriptions, with all sorts of whistles buzzers and bells. I own both. The difference is minor, perhaps having to do with a remote. I'm not sure.
I will say this that if you run a couple hundred old DATs through this thing, you will need to get it serviced. Here in LA, there is an Armenian guy on Hollywood Way in Burbank adjacent or maybe North Hollywood in a dumpy strip mall that will bring it up to factory specs for $100-150, mainly cleaning and belts, but way beyond my skill set. PM me if you want the name.
It is in my opinion, it is the finest DAT machine ever made, and was used by many of the radio stations and studios here in LA before digital drives. I think it cost well over $5,000 in the day. In used condition, I would not pay over $200 for it, because I think no matter what, it will need servicing.