If these two games use the "standard" pre-programmed instrument set of the Roland MT-32, then you might be able to load a MIDI mapping or a set of SountFonts that will play the music in fairly high quality. However, if the game makes full use of the L/A synthesizer of the Roland MT-32 to generate custom instruments and such, it will never sound proper on any General MIDI device.
Also, some games were actually composed on an Adlib (OPL2) sythesizer and "ported" to the Roland MT-32. You can usually recognize such games by their use of very "generic" instruments. Those games actually tend to sound better on Adlib and Sound Blaster compatible cards. You could just try it out using DOSBox and Munt to compare the music in OPL2 mode to the music in Roland MT-32 mode.
I know MT-32 synthesizers are quite rare to come by, but if you're in the mood for a fun project, you can find guides elsewhere in this forum on how to use something like the Raspberry PI running Linux and Munt (a Roland MT-32 emulator) and hooking it up to the game/MIDI port on your retro gaming PC using a USB/MIDI-adapter. 😀
One more thing, I believe I tried both games in ScummVM once and when I did, I heard emulated OPL2 music. I believe later versions of ScummVM could be made to work with Munt as well, but you'll have to do some Googling. Good luck!