The EXIT ecu uses the 'ABAR0' strategy and the RUTH ecu uses the 'ATAFF' strategy.
I haven't seen either of their bin files or played with those strategies myself but I suspect there may be quite bit of a difference considering the ABAR0 is early eec-v and just a couple of years later things changed quite a bit with the rom size requirements doubling for most strategies.
If you do get a copy of the bin files I wouldn't mind taking a peek at them
