I'm deciding between these and the vented grid loc tiles. They look very similar. Is the main difference that these are mildew and mold resistant? Do they have the same feel (walking on) as the vented grid loc tiles for the garage?

The main differences between our Vented-Grid Loc Tiles and our Vented Grip-Loc Tiles are the colors and that the Grip-Loc Tiles are made to be used outdoors and are UV stable in direct sunlight. They are both mold and mildew resistant and hold heavy loads. They are both installed in the same way and can be installed together.