The one without markings and a bigger inspection window should be the Kenitic. You can adjust timing. Just lap it and time it without the keyway.
Mine was firing 1.8ATDC so I had to time it without a keyway. Stoked I got it right where I wanted it, but the Kenitic flywheel I have is WAY out of balance....Hope yours is not!
I would check timing with a light to see where it is at with the Keyway in place and see if you even want to mess with it.