Well for me, Thorpe gets it just because it seems to have more thrill rides. Stealth a rita rip off is frankly laughable. If the 2 were side by side which would you go on? Nemi inferno is a great ride just as good as the original although the theming is missing. Saw, good ride (no oblivion though). If you want to be scared try Rush. Now that ripsaw is tired and really does not do it anymore. Detonator is a great drop ride. Thrill rides at alton? Nemi, oblivion and rita. 3 isnt really enough is it? It seems they are focussing more on thrill rides at Thorpe. Theyre not putting Kiddi rides in like 13. Worlds first yeah (what was that? biggest waste of money on a ride) Would rather have had the corksrew. I dint want to go and look at an aquiriem (if i did Id go to blue planet). I dont want to wander around Gardens. I want a thrill. Alton should look after the poeple that made it what it is (thrill seekers )
Who calls Stealth a Rita rip off? And to be honest, if they were side by side and I had never been on either, I'd seriously consider Rita, it may be slower and lower, but it is a lot longer and isn't a one trick pony.
3 thrill rides? You only listed coasters, and still missed Thirteen (last time I checked, kiddie rides were not 70 foot tall and themed around death) and Air (and last time I checked, any ride that pushes me closer to a black out than Nemesis is easily a thrill ride)! So thrill coasters, Nemesis Infeno, Stealth, Saw and Colossus. That makes 4. So Alton Towers actually has more thrill coasters. Admittedly Thorpe pulls it back on the flat front, but as Alton don't have the space for large flats, that's to be expected. They still do have Ripsaw and Enterprise, and technically, Submision is a thrill ride, and the back row of Blade is actually thrilling...ish.
And the thing with the arguments people like you have, about gardens, Towers and attractions like Sea Life, is that you make it out that you have to walk through the gardens, visit the ruins and go on all the side shows and attractions. Having the gardens and a huge gothic mansion as a back drop makes it more magical. You don't have to directly visit these parts of the park, but having them there makes a difference whether you do or not. Actually visiting them makes an even bigger and better difference, no matter what you would think.
So if all you are interested is thrills, you can have around about the same at Alton Towers, with a better setting and with the bonus of not being stabbed :P