[Samsung Infuse 4G] Infiniti350GT:
From my experience so far (I have both currently) I really enjoy both phones, but they are completely different. The 4.27 seems like a mile when the 4.5 Infuse is held next to it and since I do photography it's hard for me to put the Infuse down. I get MUCH better service in my area (middle of nowhere) drop fewer calls, people hear me better and I hear them better than the SGSII. I need to really push that because its important to me my Infuse doesn't just get slightly better service I can't convey enough how much better it is. In an area that At&t people do not have service (my captivate had none, my sgsII has none, other phones have none) the Infuse has 1 maybe even 2 bars it may not be 3G but enough to make a pleasantly clear call.

The SGSII is fast when I open up 5 or 6 tabs on dolphin browser with flash involved, switch over to Youtube and watch a video, pull my email and check one or two, shoot someone a text then switch back over to the browser.....but I get this busy on my phone maybe once a month. I then quickly realize what I'm doing is about to require a computer OR that a computer would just make things easier any way at that point.

Quick Compare:

Infuse has no issues that stand out to me, camera, speed (faster than my modded captivate when I ran Infused 2.0) screen quality colors a little washed I think because of resolution of a larger screen but difference was really negligible, microphone quality, speaker quality (phone and external) very smooth, Touchwiz 3 is boring: Touchwiz 4 would be amazing on a larger screen like the Infuse.

SGSII - Screen at 4.27 seems a mile away from 4.5 - Through daily regular "normal" use I notice NO difference between a dual core and a bump in RAM. Simple use of browser, email, phone, text etc. I see no speed advantage. I do not feel the OS or apps have been fully optimized to take full advantage of both cores. An extra 512mb and you may notice a difference in daily use but otherwise the rest would again be negligible. My microphone suffers from the clarity issue as others, NOT one single person understands a word out of my mouth on the S2 and I have tried every single fix. Because of this I have almost thrown this phone just like my captivate I stop only because I have much more invested and I intend to get my money back. I am quite frankly upset with the overall product. Part of my reason for picking it up was the development and how much it has already got designed for it, but when I have done everything possible to fix it with no luck its a hardware issue and I am not the only one that has suffered this. I do have a pink spot on the camera, this can only be seen on a white wall in the correct light, since I don't photograph white walls in medium light....this doesn't concern me. For the slightly yellow left side of the screen...I have that to - I never noticed it until I read about it. The microphone kills me and highly annoys anyone else on the phone. Search for the other posts on this if you want, but I assure you I will never spend almost $700 on another Samsung phone again that's for certain. I will be keeping my Infuse and enjoying its massive screen with great call quality and reception. Slower or not it's basic phone functionality is still intact for a price that is less than half as much as the SGSII.