Well, it's same for both far as I can tell - from the emu build download info (i.e., the 'old' one, and steam).
As far as crashing with the RoF2 build, yeah, let's take a look, since that one has had some changes made to it, where rof hasn't so far afaik.
To see the specific build info, hover over loader icon in tray and it'll tell you, and also does it if right-click, system info. There actual compile version is there also, tells you 'yours' and 'server'.
htw