In my opinion, if you decide to use the rules in Robots, then you should
not include any part of them in GURPS Mecha. You should instead add all
the custom rules that are needed to recreate the mecha style of combat.
Please, DON'T make the same mistake you did in Supers, where to satisfy
the idea of the writer you completely missed the point of the genre (How
about a new GURPS Supers, uh...?).
In any case I will buy both books, but I would prefer not to see any
reprinted material. Thanks for asking.
Andrea Minini