first I will give you fact and then I will give you my opinion and I am a senior member at X d a developers in day former contributor for Android creative syndicate. fact....snapdragon s4pro quad core is the fastest chip in the world, it Handley takes Tegra quad and Samsung Exynos quad. easily. now I do prefer pentile amoled screens but I own both phones .now the Optimus actually has a higher resolution but lESS pixels per inch sgs3 is 320 is 318(LGOG,OPTIMUS NICKNAME IN WHICH MY THREAD ON XDA MADE THE OFFICIAL NICKNAME STICK) woohoo....well enough with narcissism,lol. the optimist is crystal clear and you can see it much much better in sunlight but the galaxy has better truer whites and blacks and over saturated colors which I do like more!! The Optimus is more true to life ....it's all Opinion . development is just starting for the LGOG and jelly bean isn't here yet. But using a dollar in the play Store U can unlock your Bootloader which was the easiest unlock I've ever done and I have done many unlocks. also, the Samsung Galaxy S 3 has tons of development and jelly bean, both have 2 gigs RAM. now you're at the top of the food chain when it comes to speed with the LGOG but development is scares even though all the guys from the Motorola Photon(jokersax.com and th3bill and more) have now moved to the LGOG. so development will improve much. even though you're at the top of the food chain I would probably go with the Galaxy s3 simply because there is a lot more you can do it right now although I really love the look of the LG OG. and the fact that there is no phone in the United States that is faster and trust me the DNA isn't, it's Kernel isnt as good. and most people should know how important that is the ROM is the body and the wheels of the car the Kernel is the engine in the electrical system it's a little more important.hope I helped