You can utilise it for both workouts. On ME day work up to a heavy triple and do that for three sets, alternatively you could aim for a big single and see where you're at. On DE day, make it an accessory after speed bench (3x8-10). I can 2-board more than I can floor press, so yes, I would say it is harder. The key to the floor press, as you mentioned, is the pause. This is what makes it difficult, and also the fact that you have no leg drive.