For over a decade, I played both on the go regularly. I found that portables get as much use at various destinations with power sources TVs, etc as they were used on a bus. If these two systems are being judged on functionality, then a huge pro for the Nomad is being able to hook it to a TV like a regular Genesis and add extra controllers. Even on the go, you can have 2-player SSFII matches with 6 button gameplay.