Just to follow up, I compared these to some 105-50 chromes also tuned D standard and they are slightly different. The chromes feel more metallic where these are sticker almost like Rotosound 77s, and the 100-45 set of these felt just as stiff as the 105-45 chromes in the same tuning. The two basses are very different tonally but taking that into account the Gibson strings were still more present in the p bass low midrange compared to the other bass, which was absolutely not present at all in the mix no matter what I did or how I adjusted eq/volume.
Overall though @pcake the Gibson strings are definitely stiffer as you mentioned, if I was to buy a set for E standard I would go a gauge lower than the 100-45 whereas the 100-45 chromes seem just about right in E standard on a PJ bass- though I'm taking both sets off as I see no real value in using them for what I need. Last gig with the chromes set the drummer even told me "you sound good, but not as good as you usually do" which was enough to go back to the rotosound 66s I usually use.