The APR stage 4 video that Stallmer posted is on stock DSG box. No programming or physical mods. I don’t know what kind of power it’s making but I’d guess over 400whp. Also, it is a manual so the only thing to slip would be the clutch, which can happen on a manual.
I think the DSG unit weighs about 100lbs more then then manual. Remember, the DSG is not an auto and has nearly identical loss as a traditional manual transmission.