JVC TT 71: buy now for spare for my or TT81?

I own 3 JVCs, a TT101 (which is dead) an 801 that runs like a clock, and a QL 7 with a TT 71 engine that I just did a full restoration; all my turntables I restore and overhaul by myself.
I think TT 71 and 81 are better than Technics SP 15 and 25 at least in terms of engine.
The TT series engines are big and sturdy as breakfast cups and there is a lot of substance, those in the SP 15 and 25 or SL 10 are the same as the small and compact Technics 1200s.
It doesn’t mean much but I like fat.

The motor TT 71
https://i.postimg.cc/J0pSMJ3z/DSCN6089.jpg
https://i.postimg.cc/zvyFHgZB/DSCN6093.jpg
https://i.postimg.cc/bJBQPwDj/DSCN6100.jpg

In the TT 101 I made a complete recap and replaced all the pcb trimmers but it still didn’t work well .... I have to give up for some time ... it totally stressed me out!

@billwojo I'm not sure but I think the TT71 and the TT81 use the same motor. 

he has never had a TT81 to make a comparison with the TT71 so I don't say anything, but I deduce that to save on scale production ... yes .... the TT 81 "could" have the same engine.