I have had both, and currently have the Hollowbody ll piezo, only because it has the piezo. The Piezo guitar has a more open sound, with stronger treble response. More modern, if you will. I got it to do musical theatre with. The standard has, to my ears, a warmer fuller sound with less treble response, but still with a really great top end. If the standard piezo had been available, I would have been very happy with that, even though it doesn’t come in blue. My luthier was impressed with both. I played a certain classic semi hollow from another brand for several years. Both hollow bodies are better, IMHO. You can play above the 12th fret in tune, and the low end is clearer. I did put locking tuners and locking bridge studs on the guitar. Other than that, bone stock.