This is just my hunch but I think with the way it's worded, [@Sierra] intends the squads to pilot the same base chassis (MR-7 Predator). Because the RP revolves around a professional military force, the mechs are standard-issue: there's an element of realism in having the squads pilot a uniform chassis. After all, most modern states have just a single vehicle dedicated for their niche (USA has the Abrams as its sole MBT, etc.).
Players have the agency to alter the loadout and specialized equipment on their mech to fill certain roles (all-purpose, long-range fire support, etc.) But the chassis will be identical, if not different variants of the same. The aesthetic of said chassis, is up to your individual imaginations.  

In the past, I've sort of circumvented the 'standard-issue issue' by running RPs based on mercenary companies, to accommodate a variety of chassis designs. Players are probably more willing to utilize mechs of their own tastes. What I might suggest is presenting a couple of illustrations and having us vote on which one(s) they like best for their chassis.