What about Tobot OP and Tobot R? What are those guys deals???
They're mostly their own little guys who ~vaguely~ look like Optimus and Ratchet Like, they exist in the same universe close enough that someone can instantly say "hey these guys look alike" keyword alike, not identical. Plus, they 100% can and should meet.
M, OP, and R (medic) all don't have pilots like the other tobots. They're all part of a team that's supposed to go off to America when complete (i suspect either they need more time before that happens, or there's more heavy duty ones to come), the north desert team!
Tobot OP was the first of the heavy duty tobots. The way i describe him is that over all "rounded" look like rid01 optimus or armada optimus, he's lighter shades of red and blue than tfp Optimus who also exists here (he's also shorter lol. Big Optimus and baby tobot OP) But, his creator believes that OP is "failed", because he isn't all that tough (thus, M). Tobot OP is just so nice and little and has the cutest damn crush on M
Tobot R (medic) is in general pretty similar to Ratchet, he was the next one made of the heavy duty team (and tbh considering what I've seen of tobots an ambulance fits right in, secretly actually), he's a bit like a blend of tfa ratty, tfp ratty, and a little bit of g1 Ratchet. Out of the three tbh i think R (medic) is most like his cybertronian counterpart? OP was jealous of him at first but this was resolved.