So this is what I didn't do to my fiesta today. I saw an incredible deal at a local dealership on a 2015 Subaru Wrx Sti. $23,800 with 40k original miles, 1 owner, certified-pre owned (7yr/100k mi powertrain warranty). I love my fiesta but I've always gotten bored way to quick and decided, why not at least go check the STI out. So I did, and I was not impressed. I've worked with the salesman in the past so he was cool with letting me rip on it. I put it in the "sport sharp" mode and got on it the entire test drive, both Highway and rural roads. I must say I feel way more connected to the St than the STI. The STI has a sense of "maturity" to it and certainly has a more linear power band but it just didn't have that ST characteristic. It built boost as you would imagine but remained anti-climatic the entire time.