Oem forks can be diferent to general sale forks and the name usually leads you to that conclusion. Specialized for example use OEM fox forks that fit the geometry of the frame they are fitted to, same with Gary Fisher and their G2 technolgy. This can be so that the brand can cut costs For example asking for 1000 fox f90 forks but without lockout to save money.
But On-one where selling Fox 32 140 RL, which is exactly what you got, not a fork that was specially adapted.
The whole pump argument in my opinion is a waste of time as you have just saved £400.
I would like to say i've had 5 plus frames from on-one, and placed countless orderes with them and always even with daft queeries been really pleased with their service and willingness to help, thats why i go back and recommend them.