We will probably enjoy a PO and a Kobra on different guns for different reasons. I use the SAR1 for close work blasting, and find that a 1.8moa dot has little effect on groups with a 4moa gun. My 5.45 guns are for detail work, and good glass gets the most out of them.
The PO weighs a pound more than typical scopes, and gives you twice the FOV (should be handy hunting something that moves). The weight is well-centered, like the mass of a milled or RPK receivered AK it has only a very minor impact on handling in most situations. The well-defined reticle and strong clarity make it more effective in accuracy than a cheapo 6x scope. Unless you plan lots of long shots at steady targets, I suggest the PO over a 6x42 or 4-8x42. You can learn the reticle drop with basic practice in any gun, even though the PO is marked for the 5.45 flight path. You need to get the eye up to the rubber in the PO, which will mess up glasses more in the 7.62 gun.
When in doubt, up to 100yds, start with a Kobra for either gun, play a while, then choose your next optic.