Same for BluGuitar. I can't notice a whole lot of difference with my BluGuitar Amp 1 Mercury Edition vs Fryette PS-100, and similarly the BluGuitar Amp 1 Iridium Edition feels very similar to my Mesa Mark V 90 at full power.
Maybe I've just had too good poweramps to use with modelers so I've never been disappointed with the modeler -> poweramp -> guitar cab sounds?