@SteveS1 Adapters from different brands should be compatible with each other as long as they are compliant with the relevant standards.  Most PLA's these days are compliant with HomePlug AV or AV2 standards.  Older standards like HomePlug 1.0 (85 Mbps) and a few others that are mostly now obsolete are not compatible and will not communicate with AV/AV2 adapters.

I have used TP Link adapters together with Zyxel (AV 500 Mbps) and Solwise (AV2 1200 Mbps) adapters, and it's worked fine for the most part.  Note while TP Link's PLA Utility can "see" adapters from other brands, it can't change any settings on them.  You'd have to use Netgear's own utility to make any changes to settings on the adapters if required.