"People don't know debate until they've seen one for these levels. Seriously, half say ToE 2 and half say Clubstep!"
-Blubber Maker while discussing ToE 2
Demon levels. They're hard. They're frustrating. They're the only levels in Geo Dash that really make you want to throw your iPhone 6S Plus (or even an iPhone 7; who fricking knows these days) against the wall. I don't really see why Clubstep vs. ToE 2 is the biggest debate on Geo Dash because honestly, one is much easier than the other IMO. When I first encountered Clubstep, it took me +500 attempts to beat it in practice mode. ToE 2, on the other hand, only took me +200 attempts. The main difference I've noticed between the difficulty of Clubstep and ToE 2 is that Clubstep requires lots of twists, turns, and you're constantly switching gravity. ToE 2 doesn't have you switch gravity that much. After several (and i DO mean several) dozen crashes at 66% and 80%, I managed to beat Clubstep in just under 3000 attempts (2954, to be exact.) ToE 2, however I managed to beat in over 1200 attempts (1268, to be exact.) and I found myself zooming through it with ease. In a few weeks my progress improved from 37% to where I currently am. Sections in ToE 2 that people SAY are hard I don't usually have much trouble with (such as the triple spike right before the first wave). In fact, the only part I really struggled with was the last ship (the ship and I aren't exactly pals, you might say.)
UPDATE: After beating ToE 2 I went back and did Clubstep again. Don't ask me why. I managed to beat it two more times (and failing miserably to get the second coin) and that's when I realized ToE 2 is still easier than Clubstep. ToE 2's got its hard spots, but I still practiced Clubstep more. And after levels like Electrodynamix and Clutterfunk, my ship skills improved MAJORLY. ToE 2's ship sections will indeed help you improve if Clubstep is what you're after.