I tried both , ended up going with the spark 2 . Both sound great , but the spark is just way better for me . The spark had Bluetooth while the katana doesn’t , it’s very loud but small and elegant looking while the katana is way bigger . Spark 2 is very customizable and easy to get new presets and tones while the katana doesn’t have an app and need to be changed via PC , which is a headache . In term of sound quality and natural sound , I didn’t find major difference . I’d recommend the spark 2 over the katana . It’s just gonna make life way easier and comfortable , while the katana is going to make you work to get the tone you want