Both of those corners would be great to get good bass trapping in. VersiFusors can still be used helpfully in small rooms, just in different ways. For example, rear wall is typically a great spot for diffusion, but in a small room bass traps are also very helpful to have in the same position, and bass traps usually take preference since the bass is less manageable than high frequencies in a small room. But you can still use the VersiFusors on the side walls in the rear of the room and higher up in the room closer to the ceiling on any wall to prevent flutter echo without overdampening the high frequencies.