“my plans quite simply is to keep up or near my friends 2020 bmw x4m competition”
You will struggle! I have an x3M and my focus is DS3 with all hardware (other maps are available!)
FOCUS
40-80mph 3.7s
0-60mph 4.48s
1/4m 12.87s @ 111mph
BMW
40-80mph 3.8s
0-60mph 3.66s
1/4m 11.78s @ 116mph
I think you are going to need forged and 450horses. That said, the focus often feels faster. Down a bumpy road the RS would walk away, but on a smooth fast road, think the X3 would surprise.
I think that in gear accelerations they are about the same………….but every gear change the focus loses ground. Also not much in terminal speed on the 1/4 so i think maybe the drag effect is coming into play.