I’m 180cm with long legs/short body and went medium.
I have a lot of post showing when the saddle is up but still got a bit to spare with a 350mm post. Running a short stem for me. Ride 18″ inbred or 456 in past
Fit is good, wouldn’t want a bigger bike.
Considerations for you:
If you are a xc rider then the bigger from may suit as you’ll have the saddle up more and want a longer top tube.
It is often easier to make a bike alight
Y bigger with a payback post and longer stem than make a bike slightly smaller.
There often isn’t a big jump between frame sizes but with the parkwood there is. Can you compare to an existing bike?