I had some of my motors out for cleaning so I decided to take a few pictures to show the different motors side-by-side.
TeknoNeu 1515/1Y
Castle Creations Monster Mamba Max 2200kv and 2650kv motors
TeknoNeu 1515/1Y and 1515/1.5D (square can)
Feigao 8XL, MMM 2650kv, TeknoNeu 1515/1.5D