You've got a real interesting looking group there Ken, some have huge overhung beaks and one has no beak at all almost like a Brassie in a group of Frankies..... lol.
Sounds like teeth may be an easier way to differentiate the species.... Frankies having a few (2) noticeably larger teeth vs brassies having very uniform teeth.
I picked up a small group of what are supposed to be Brassies from Ray not long ago. My group is currently in a 125 with a few Geos and some Ornate Pims. Actually going to add some Masheer as my group seems to enjoy descaling eachother from time to time. Hoping some quick swimming shiney fish will calm them down a bit.