As stated, the PL is the PureOne version, and the L is the Purolator Classic. Depends on how long you are going to run the filter if I'd leave it on. My biggest thought would be the anti-drainback valve on the Classic is nitrile, which can get hard and not retain oil as well as the PureOne's ADBV, which is silicone.
Personally, even though its probably not a big deal I would return it. Ive always ran PureOnes on my bikes and car (and my family members cars when I change their oil). It would bug me knowing it wasnt a PureOne. But thats just me lol probably isnt actually worth the trouble of returning it.