AFAIK lunar Starship still has Raptors in the tail that do most of the burns, the "belt" engines are only used for the final landing phase to reduce the ammount of regolith kicked up by the rocket plumes contact with the surface.
Re:NASA’s bet on Starship for the Moon
by dillondoyle on Saturday April 24, 2021 @01:05AM
(#26922386)
Interesting. So would still do a 'dock' and could come back on a different Starship, Dragon, or SLS it sounds like
Because Moon-bound Starship will be quite different from Earth-bound - not enough to not call it Starship, but still - the Moon-bound will be optimized for less gravity (different legs?), no atmosphere (no wings), braking using engines in the middle of the body, not in the tail section, Moon-specific systems like ladder or elevator etc.