I'd say the S3 is mapped for sure given he could pull away on the straights. The rest could just be down to driver ability.
The S2k is quicker than a standard S3 for sure. One of my best mates had one and we had many traffic light sprints when I had the S3. Even after I had my remap, I could never quite shake him off. Catch him 'off VTEC' though, and I had him beaten!