I found myself having a full boost meter less often, which allowed me to take in my surroundings just a little bit more as I flew through the city. (nintendowire.com)
Inside, they both get F Sport trim and leather scuff plates, sport instrument cluster with digital speedo (with G - Ball & Boost meter in the MID), steering paddle shifters and black headlining. (paultan.org)
The main difference on the track is a permanent nitrous boost meter, which allows you to increase your speed almost exponentially on straights by boosting until it's nearly full, letting it subside and then hammering it again. (eurogamer.net)