So, saying that one offers more amp models, cabinets or effects, at least among the three prominent guitar studios, is nonsense. Most of them come in both standalone versions and as plug-in effects to be hosted inside your DAW. There are a few really great guitar studios around all offering copious amp models, cabinets, guitar effects and even a kind of multitrack internal studio where you can record different takes during guitar practice.
If Jimi Hendrix were still alive, there’d be no doubt which virtual guitar studio would fit him perfectly: Guitar Rig 5 Pro – great rock sounds, out of this world effects.