I have my Warpac command stands based with a Gaz 'jeep', a few command type figures and then either a BTR/BMP model for Motor Rifle units, or a T-55/64 etc for tank battalions.
For CO stands I tend to add an AA weapon and use a truck or two rather than an AFV to differentiate them. Bit more awkward to distinguish them from non-mechanized infantry but that's not come up in game yet
In game terms, they're all the same - a standard Command Stand with CV (whatever) & the usual 4, save 6, move 40 etc.