That was a sentra SE not an SER
the sr20de in there revs to 6750
the qr25de revs to 6250
in N/A form i would take the QR over the SR any day of the week
there was no SER sentra between the 200sx ser and 2002 when the SER “badge” was brought back with the 2002 sentra and the qr25de engine
and i dispute your original claim about the sr20 being “much more fun”
because torque = fun 
the 2 engines are difficult to compare because the sr and qr are completley different engines and share very few similarities in performance, power delivery, construction and design