Have you decided? Anyhoo That is quite a tough decision you have there. I own both a 2005 STI and a 2015 fiesta ST. In day to day traffic situations the Fiesta will be your best friend, clutch is light and easy and mpg is miles above the STI. As far the as heel toe, it seems to be ok in my car... not as good as the STI though. I basically only drive my STI to track days and as a weekend type car. My personal recommendation would be to keep both! But I don't know if that's an option for you.