Look at GunBroker. I don't think there is much difference. The safety first appeared on the 94's in the early 70's [someone reference this please]
The absence of a safety is more desirable for Cowboy action but less so for hunting rifles. Many CAS shooters remove the safety; there is a block that replaces it.
I have a 1969 made 94 carbine (no safety) that was later converted into a Cowboy model, however I have 4 other 94s with safeties. You can tighten the set screw so the safety will remain off.