Very similar I’d say, supercharged S550 by recognised Ford partnership tuner, the Roush puts out 720bhp. Same supercharger, some different cosmetics, Roush suspension, not FP, Roush active exhaust, RHD, 10 speed auto or 6 speed manual.
Pretty much the same, here it is in the same Twister Orange, except in Oz https://www.ford.com.au/performance/mustang-rspec/