Wiltonauer
SS.org Regular
The Katana 50 is a very solid choice out of that lot.
I haven’t tried the smaller Yamahas. That one is the acoustic version; is the guy playing acoustic? If not, there’s the version for electric here:
Yamaha THR5 V2
Amplificador de Guitarra Para guitarra eléctrica, 5 simulaciones de amplificador (Clean, Crunch, Lead, Brit HI, Modern), Efectos: Chorus, Flanger, Phaser, Tremolo, Delay, Delay/Reverb, Spring Reverb, Hall, Reverb, Controles de tono, Afinador...
www.thomann.de
The Katana Mini is good, for a battery-powered toy. Sure, there’s no app to worry about, but it’s also closer to being in the same league as a Blackstar Fly 3 than most of the other amps mentioned so far. It’s an amp I would keep on my desk at work, to play three times a year and not care if it got stolen.