These questions really devolve into a personal and subjective evaluation. Or at least that's how I ultimately take a decision on a purchase.
I will assume for purposes of discussion that you have shouldered and fired each of these rifles? That neither of them outshines the other to a degree that you are persuaded?
They are very different rifles in many respects. I guess perhaps first settle on the cartridge you want to shoot, and from that decision the choice of rifles should be easier. If you intend to shoot the Dirty Dog ammo through your PTR, you will not realize the accuracy potential of that rifle. Wolf is ok for blasting, but it is certainly not what one would choose for accuracy.
What I have come to really like about my PTR91, aside from accuracy, is the high degree of modularity. Assuming you keep an eye on parts count, there is a plethora of furniture you can install on the rifle. I like that it accepts the Hensholdt scopes, which are readily available these days at a very favorable price point.
Out of the box, however, the PTR trigger leaves a great deal to be desired, and in that department the Oly will perform better.
Since you have shouldered these two rifles, you already know that the PTR is quite heavy.
For me the choice was rather obvious, mostly because I really don't like the AR series of rifles. Nothing wrong with them, but I just don't like them. I enjoy what I perceive as the advantages of the 7.62 chambering, ease of handloading, very good accuracy, and a little more authority on target.
I did spend quite a bit more on my rifle to get it to the point of comfort where it is now. I bought a heavy buffer and a magpul stock, and paid an experienced riflesmith to install that setup. I bought a muzzle brake, and had the trigger done by Bill Springfield. The port buffer was a "must have item" if I intended to reload the brass fired in this rifle.
But for me at least, I have been pleased overall with my decision. Everytime I whack a plate or a rock at distance with the rifle, I smile as the plate twists about like it were in a hurricane. You just don't get that sort of reaction from a 556, of whatever flavor.
HTH.
