Samsung uses the 1.2GHz Exynos or Tegra 2 in some SGS2 models, but also uses the 1.5GHz Qualcomm S3 (same as some Sensation variations) in other versions, and they still call that an SGS2 model.
As an aside, you may find this kind of funny, but Samsung actually uses EVERY SOC in their Galaxy SII series.
GT-i9100 - This is your global Galaxy S2. It uses Exynos @ 1.2ghz.
GT-i9100G - Same phone as the above, but uses a 1.2ghz OMAP 4430. This was made for certain countries simply because the 9100 was selling too many models. It outpaced Samsung's expectations and they couldn't fabricate enough Exynos SOCs. This was a supplement to the 9100.
GT-i9103 - This is the Samsung Galaxy R. It's a "budget" Galaxy SII with an SLCD, weaker camera, and a bunch of other cheaper modifications. Uses Tegra 2 that Samsung claims is clocked at 1.2ghz, but it actually tops at 1008mhz in most cases.
Galaxy SII LTE - This is the Galaxy S II LTE (can't find the model number), and it uses the Snapdragon S3 @ 1.5ghz. This was because Exynos wasn't compatible with LTE radios at the time (nor HSPA+ 42mbps radios as well).
US carrier-branded handsets chose a base that worked for them. Sprint uses a modified i9100 with a larger screen, T-Mobile uses the S II LTE with a 42mbps HSPA+ radio in lieu of an LTE radio. AT&T uses the base model for their "Attain," the Snapdragon model for their Skyrocket with LTE, and Tegra 2 for their Captivate Glide (yea, AT&T has 3 SGS2 models!).
htc fan eh ?......me too
sense in my opinion is the greatest of all ui's
especialy sense 3....cant say much for 3.5 though. I hope they didnt remove that live weather wallpaper. Perhaps you have used sense 3.5 ?
Whats it like compared to 3 ?
I loved Sense on my Incredible and I've come to love TW even more on my SGS2. Each has its advantages, but TW has one advantage that Sense doesn't - the ability to get out of its own way. When you use an alternate launcher on Sense, it takes away some of the Sense-functionality as well (like the widgets). I hope it's fixed, but in my case, Sense's launcher (Rosie) would stay in memory and would constantly clear defaults so I'd have to re-select my launcher. For TW, you can still use every widget and feature without the launcher. Lastly, the TW web browser on the SGS2 is the best stock web browser on any Android device prior to the Galaxy Nexus, and I can prove this
It uses a tiling method (similar to the iPhone, WP7, and Android 4.) which gives it an ultra smooth experience.