A 25kHz bandwidth receiver will have the capability of receiving 3 x 8.3k-spaced transmitters when tuned to a 25k spaced channel. Deciding which one was for you could be a potential issue.
The audio filtering on a 25k bandwidth radio's transmission would *probably* limit the transmission width to be within an 8.3k radio's receiver bandwidth if they were both on the same 25k-spaced centre frequency. If not, the adjacent 8.3k channel receivers, if reasonably close by, would hear 'splatter' from the higher audio frequencies.
It would be nice to think that adjacent 8.3k channels are going to geographically very widely spaced...?