Three versions of MW2:31CC - DOS, 3DFX, and Titanium.
Two versions of GBL - DOS and Titanium
Three versions of Mercs - DOS 1.06, Windows 1.1, and Titanium.
I've taken one shot from each version, to show the difference in the graphics. Shots of different versions of the same game are taken from the same place. So, here they are.
MechWarrior 2 DOS
MechWarrior 2 3DFX:
MechWarrior 2 Titanium:
Basically, the 3DFX looks a lot nicer than DOS, with texture-mapped worlds that are faithful to the original look. Titanium has nicer looking vehicles than 3DFX, both in terms of meshes and textures, but worse looking terrain and skyboxes, and are not as faithful to the DOS version.
Ghost Bear's Legacy DOS:

Ghost Bear's Legacy Titanium:
Here, Titanium seems like an all around enhancement, though somewhat annoyingly the mechs seem to be missing the Ghost Bear emblem.
Mercenaries DOS 1.06:
Mercenaries 1.1:
Mercenaries Titanium:
Here, Mercs 1.1 has nicer looking textures, and supports 800x600, but the look is rather changed. Also, the draw distance is shorter, and things like buildings just instantly appear once you get close enough. Titanium looks nearly identical, but only up to 640x480.






