The PT145 has the same generation identifiers as noted... HOWEVER we have found a few "transitional" models... those with railed frames and 2nd generation slides. Figured they were using up the last of the old tops with the new bottoms?
I can't say absolutely on the mags, but I've heard those who have tried them and worked fine. I think the PT145 magazines were pretty much standardized with the introduction of the model since they were designed differently than the rest of the calibers.