Hmm, I can foresee a flaming, but as you're a fellow Hampshire resident, I will reply with respect.
Firstly, the Nemesis theme isn't a dragon. In a nutshell, during routine excavation work (why the ride is in a big hole) at Alton Towers, they unearthed a dormant monster (the station) which they pinned down with steel to contain it (the track). The ride is you escaping the monster.
Ultimately, the story of Nemesis is superior to Inferno's yarn. The actual physical theme of Inferno is better imo, but overall, Nemesis edges it for me because it covers the station & track design and the reason it's in a big hole. (It's actually in a big hole due to planning laws, but meh, it works!)
Also when writing out topics, please can you make the titles a little more descriptive. Thanks