The V8 SHO wasn't any faster than the V6 SHO-
plus they didn't sell it with the 5speed.
But they both have Yamaha engines that aren't supported by Ford anymore.
That is where NESho comes in because they can install an MTX transmission for me out of a manual older sho.
I have driven in both and driven a mark. The mark is definitely the way to go as far as power and fun as in burning tires go. The GenIII show actually handles awesome despite the fact that it is a Taurus and it will out handle the Mark VIII stock for stock.