Here's my thoughts, I noted in another similar thread that my friends were pretty hot on the Katana Go Mini 2, and each bought them. It's a little bad-azz headphone amp for $139, equiped with the std Katana app that can be saved to, or retrieved from their popular Katana series amps (and store, and shareable) . I hear nothing quality wise, even remotely close with the Fender Studio (to be fair, from the really poor examples so far) which sounds like, well.... a cell phone app. Granted, each is a little different in design, but guitar quality sound is my guiding force. Yeah, yeah, its all opinion (they said), but actually it's also not. I'm pretty battle tested on what sounds good for guitar. ; ) Others can make up their own mind. I suspect it won't take long.
Sorry, but my money is on the Katana Go mini 2. People may not like to hear that, and I wasn't really thrilled saying it. But in the end, the Lil Kat is very hot sounding, and also can be inserted direct via USB.