Their is no separate match making for PvE like there is for PvP its all the same pool. As to answer your question, the over all skill curve on PC is much higher on PC then console in general. Im sure lower spec hardware does play some part but the PC community is more invested then the console community. An example of this was when they first introduced the cross play system they made a mistake and console players were matching PC players in PvP. My god did that river of tears over flow the forums from console players and the PC players had a field day ripping children's arms off in PvP.