I believe the difference is
The Gameseeker II offers the precision plex reticle as an option, while the Gameseeker does not.
At least that is to the best of my recollection and a short google search. I bought the gameseeker II recently with the precision plex and I really love the scope. It is extremely clear even at dusk light and seems to have excellent adjustments.
Right now it is the 2nd favorite scope I own and only cost about $98 from Cameraland of NY. I suggest you check out their website as they carry many Pentax scopes.
