Surreal64 is an old version, but it'll work better then the newer verision Surreal 64 XXX. A rom could play better one the old one then the newer one. Why i dont know, but i use both of them for all my games and some games work better on one then the other one
. Its some wat like a balance, but in the end the rom will work just find just got to find the right Surreal64 emulator to run it and the right settings. In my case the two work just fine when you have them both