Get an Iphone. Easier to use and far better build quality.
		
		
	 
In the wrong forum bud!
Apple section here:
http://forums.overclockers.co.uk/forumdisplay.php?f=109
And don't let the door hit you on the way out 
Anyway, personally I think yes for £90 it diff is worth it!
- Much better screen overall for colours, battery life, view abililty in sunlight, the only advantage of the sensation is a higher res screen, which is better for browsing.
- Better processor, GPU and more RAM
- A LOT more internal storage
- touchwiz is much better overall IMO, although sense is more pretty, main reason for touchwiz is that it has built in codecs so playing some HD films is very smooth and really no need to do any converting etc. and the most important thing is that the entire mobile/UI is hardware accelerated, everything is super smooth, virtually no lag and you diff notice it when web browsing compared to the sensation for scrolling
- better camera/video recording especially in low lit areas
- better build quality
- better battery life
- iirc the sound is better on the GS 2?
The only advantages of the sensation really, is the screen res, the mobile feels like a more "premium device", sense is a nicer UI in terms of looks and some functions however very bloated and takes up a fair bit of RAM.