I have the 2.0 TSI 4x4 DSG, how it compares to an Octavia VRS I can’t say as I’ve not driven the VRS. However I don’t think you will disappointed especially in Sport mode! To go back to the 1.5 TSI engine, yes it did have issues, yes they have improved, have the problems been completely solved - not entirely, and are much more noticeable with the manual gearbox, so the DSG is the better option. However the 1.5 TSI DSG is 2wd and prone to front wheel spin when pulling out of junctions. I don’t think the 1.5 TSI is available, in the UK at least, as a 4x4. In 10,000 miles in my 2.0 TSI I’ve not encountered front wheelspin when pulling away, even at damp junctions, where my 2.0 TDI DSG 2wd Touran would spin and traction control would cut in. The 1.5 TSI uses the dry clutch DQ 200 DSG, the 2.0 TSI uses the wet clutch DQ 381. The road holding and grip of the 2.0 TSI is excellent. The rear suspension on the 4x4 Karoqs is the VAG multilink setup ad used on the VW Touran, Passat and probably Octavia and Superb. The 2wd Karoqs use a torsion beam rear suspension.