Benji looks very similar in body shape to both Toby and Ollie.
Toby is a very stocky (and quite tall) cocker and has slightly shorter ears than an average cocker. At one point someone suggested he might be a working cocker as he didn't have much coat. But after looking at pictures on the net I think he is a definitely a show cocker...his coat has grown a lot now too.
If you don't want to clip Benji you could try a Mars Coat King by the way
I think with rescue cockers they are more likely to have "imperfections"...they are more than likely not from good breeders in the first place. But they are still very much cockers, and Benji is a lovely boy