You are right with the assumption, just some ESC, not a dual controller though. Whether it's suitable for the robots, I'd leave that up to the more professionals to decide, though personally, I'd look for an Amp rating, and seeing if there's any specs online. Only just got into building myself, but had previously bought robots, so I can offer a little bit of advice, but sadly, not loads.

Also, sorry to deviate off topic a bit, but I never knew there was more than a couple people from the Sheffield area on here, I'm quite a bit shocked. And, also, sorry for a bit of a brick of text, and apologies for some other things, I assume.