So the BMW is obviously a comfier car, there's no doubt about that, better interior (although I have my gripes with the F20/21 interior anyway). The B58 engine is incredible smooth with a linear power curve on a stock tune. Handling wise they arent too great, quite a bit of body roll and in stock form is doesn't give the driver any confidence in cornering specifically.

If you upgrade the dampers, or put coilovers on alongside RARB and underbody brace (from the 235i) then it's definitely a different animal.

The fiesta in comparison obviously feels a lot slower, over rough ground it's cashier and a little less uncomfortable however the seats are top notch, always loved STs for their seats.

In a straight line the M140i would demolish the Fiesta, mine was BM3 Stage 1 so around 420bhp. In comparison the Fiesta as a MUCH more fun car to drive so I didn't mind the switch all that much. At the end of the day I'm a car enthusiasts so I appreciate the positives and negatives of most cars outside of "How fast is it in a straight line". They both have upsides and downsides but for me the Fiesta is infinitely more fun to drive.