LGT-92 GPS Modul

Hello,
I bought the LGT-92 and noticed that different GPS modules are installed.
Mine has the Ublox-Max7. But there are also some with L70, L76, or Ublox-Max8.
Is the Ublox-Max7 better than the L76?
The L76 can receive more GPS systems.
A little more technology, is the Max7 compatible with the L76 pin?
And is there already a new list with the AT commands for the Ublox devices?
At least the following commands do not work as described.
AT+FTIME=0 // is ignored.
AT+NEMA886 and AT+NMEA353.

regards
ThomasD