I can help with both. In a nutshell they are both great amps. The Briefcase lacks in volume, but the clarity is untouchable. It really couldn't be used for anything but home practice,recoring or a small coffee shop type gig. The Suitcase is great in conjunction with the 4b extension cab. It's great for small to medium sized gigs. Quality is a 10 on both. Tonally they lack a little bit of warmth but makeup for it with the ability to cut through anything with the mids slightly boosted. They can handle a low b pretty well. Realistically the only complaint I would have is just not being uber-loud. If you're in a metal band this is NOT the amp for you. Jazz or funk that's a different story. Good luck