A quick google search shows people having trouble getting those two games to run at full speed or at all. It may be user error though, using the wrong romset or something. Best bet is to try it yourself assuming you have a pi.
While they do work, there are some sound issue with Demon Front. I’ve not tested all the other PGS games yet. On a side note, FBA-Next fixes all sound issues with Neo Geo games.
I’ve tried knights of valor and works fine… but sega modeler not… i’ve tried thw two core but dosent starts… sega modeler has great games like spider-man arcade game and golden axe 2 revenge of death adder… this emu use bios? i cant find a expecific bios for this…