I have used my Vecturo to cut dry wall and Gladiator plastic slat wall. Worked well cutting out for electrical outlets, pipes, etc.
I would think a Vecturo blade would have a narrower kerf than a track saw, if that matters.
Try using a round saw blade on the Vecturo but only cut half way through or so and then finish the cut with a dry wall knife. I think you will have more control over such a large piece and won't be holding a power tool when it begins to come loose .