777 support of 737 CDU

As i understood the 737 CDU will be compatible with the PMDG 777.

But how will this work with the different menu buttons like VNAV, ATC, and the different location of the MENU and FIX page buttons? Will the locations be the same and the labels will be swapped so FIX button goes to MENU page, etc?

CS 737X CDU

in 747-400/747-8:
CLB → FMC COMM
CRZ → ATC
DES → VNAV
N1 LIMIT → NAV RAD

in 777:
CLB → FMC COMM
CRZ → ALTN
DES → VNAV
N1 LIMIT → NAV RAD

These few buttons have differences and their functions have been redefined, while others remain the same.