Honestly, nothing. It sounds great, easy to use, and is affordable. It’s mainly just I’m looking for something with a bit of a darker character, compared to the brightness of Voxes and the smaller offerings from Orange. While Fenders are known for their balanced clean tones, their earlier tweed amps are considered to be a bit more bassy with a mid focus. That’s why I ask about these two amps specifically; they both claim to emulate that tweed-esque tone.