Think the OEM is the BT023F (not to be confused with the "Front" designation). in my opinion, not as good as the BT023 (no suffix) or the BT023GT.
Different tyres appear to suit different riders.
I am very happy with the BT023 with or without the 'GT', the 'F' not as good. Front lasts me a good 9000 miles before the UK law requires me to change (1mm tread left). Yes, it wears into a 'V', but that barely affects the handling as far as I am concerned. The '023 or T30 is my tyre of choice, I find the grip good in all normal conditions, wet or dry.
Not going to pay the premium for the Michelins, half as much again as the Brigestones, particularly as half my rears end up being replaced after a puncture.