To actually answer your question, the Model 92 is an action length designed for a cartridge around the length of the .44 Magnum, and the new Rossi Model 92 with round barrel that I have feeds .44 Magnum very well.
The Model 94 was made in .44 Magnum, but the reports on its reliablilty vary from good to very poor. The action had to be adjusted quite a bit to make it work with the shorter than .30-30 length cartridge.
I would recommend the .44 Magnum in Rossi over a Model 94 in .44 Magnum.