I'm pretty happy with my GTI (which of course I bought as a DD, not BRZ replacement). makes around 300hp 350 lb-ft of torque with just a stage one reflash. Boost is limited in 1st and 2nd gears though, so you can't experience all the extra power unless you're in 3rd or higher.
But I'm pretty sure it's faster in a straight line (once rolling) than my Cayman S
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Current: 2023 GRC Circuit Edition, 2012 C63 AMG P31
Past: (2) 2000 MR2 Spyder, 2017 GTI Sport, 2006 Porsche Cayman S, Supercharged 2013 BRZ-L, 2007 Honda S2000, 1992 Integra GS-R