Should be better than that. But their tunes are for the masses, probably 91 octane optimized. I dont blame them. But honestly should be able to do better gains wise with a real custom tune. Nothing against Steeda.
And yes the DH and GT once tuned properly are the same power wise. People with DH think they got some higher end engine with more power and all they got was a GT with less tq management. The calibrations are identical except for a few tq management tables where the GT has more. And if you get a PP GT then they are even closer 1:1 except those tq management tables. If you want a DH, buy it for the name and the other toys you get like standard mag ride and different look body parts and the cool wheels. But not for power. Tuned GT will be faster than stock DH, and a tuned DH vs GT should be just about identical car depending.
That was my mental argument when I purchased my GT. 20HP difference should not be that hard to over come. All the extra parts I get if track days are a part of ownership, for me it’s a daily driver that gives a nice seat of the pant, with a throaty engine background. Appreciate the opinion.