Screen: S2 hands down
Processor: I've heard that the Orion was faster than Tegra 2
Software: Galaxy S2 wins
Software UPDATES: No comment on that
Cameras: pretty much the same but I doubt that a 0.7 more mp will make a difference on the front cam
Battery: As far as tech specs go, the S2 wins
RAM: I know that the S2 has 1gb but I'm not sure of how much the LG Optimus 2X has
Memory: S2 has more internal memory
Like other points other people have made, S2 doesn't have hdmi mirroring but the S2 does have 2.3 out of the box
As for which one to get....well, first off, I am with Sprint and I am sticking with Sprint, so it all depends on which phone they will get. Sprint has the Evo, the Epic, and the old Optimus, so something tells me that they might get top phones from the 3 big boys, without knowing what HTC brings to the table, I am not set on any of them yet, however, this time around I am leaning toward the S2 simply because of the SAMOLED+ screen. Last year I had no idea that we would get the Epic, so I was slightly disappointed in only having an Evo simply because of the Evos wussy 3d performance. This time around however, all 3 phones will have fast 3d performance, so I am looking elsewhere to help me make my final decision. I love the 4.3" screen, and I am glad that the S2 seems to have, at least so far, the complete package for me. And while I like Sense, something new is always nice. Buying another HTC device would just diminsh the new phone feel, since it will probably look and feel just like the Evo, just faster.
If you look at the 1080p sample at gsmarena, the S2 looks super sharp whereas the Optimus 2x was blurrier. That is another thing to consider, since Samsung is known for their imaging. The bigger and superior screen needs no introduction, and most 2x reviews have complained about LG's lackluster software and UI performance. Subjectively, the 2x is very bland looking as well. The Atrix is a better comparison than the 2x against the S2.
I would take the s2 but that's just me and if you put it against the atrix I would still choose the s2 due to android having full use of the 1gig of ram on the s2 and I don't like Moto's stance on their bootloaders
Galaxy S2 score of 1950 is really disappointing if you ask me:
While The Lg Optimus 2X scores a quite impressive 2391
So you gonna base your decision on a QUADRANT SCORE? Sorry , but this is the stupidest thing i ever heard.
1. Quadrant is just ONE benchmark program , and a really bad one. Fully relies on software and with some little weaks I could reach 3000 with my HD2 , also 2500 with Galaxy S. Second run boosts your score with 150/200 and after a factory reset the score is alot higher , nice program huh? >
2. This is a pre-production model , we dont even know if the final chip is in it , AND its also a test firmware , remember the optimus scored 1800 the first time it has been benched and later on 2300.
The Optimus 3D looks like an even better match against the S2 than the Optimus 2x. It also has a 4.3" screen, and 3D!!!!! The 2x has been supplanted at the top-end. But who knows when the 3D will be released. It kind of popped up out of nowhere at MWC.
I've read in multiple places (here's one ---> Galaxy S to Have Micro-USB to HDMI Output) that Samsung has developed, or is developing, a micro-USB to HDMI output. The website says it will go for around $50, but who knows. HDMI output to me isn't ever going to be a deal breaker, just doesn't seem necessary (although I have no doubt it can be cool and fun).
Regardless, I'm going with Sammy on this. The build is what really intrigues me. From videos I've watched, even with the 4.3" screen, the S2 is only slightly bigger, if not the same size, as the S1. I've always loved the size of the S1 and with the reduction of thickness and the larger super AMOLED Plus screen, this phone is nearly a perfect phone for me.