This is what I got when I asked the same thing on Keypub:
The N019M1 is the initial version of the radar upgrade by Radionix which UAF MiG-29s are getting - N019M1-MMK (named after the capitals of the countres participating in the project - Moscow, Minsk, Kyiv). The antenna and transmitter block are the same, the rest is new, Baguet type processors, programmable digital processing, R-77 compatibility, drop-in UM522 low noise reciever replacement, 4 target simultaneous tracking, TWS with 10 targets, 30-40% greater range in A-A, target class recognition. A-G modes have DBS, SAR and moving target detection.
It's a decent upgrade at least on paper, though not quite an SMT.