With a question like this you can't win no matter where you ask it. People will almost certainly favor a device that they own and use. It doesn't feel good when somebody asks you "which phone is better, the LG Ally or Original Droid?" when you just recently shelled out a lot for Ally. A person is going to want to grasp onto reasons to justify their decision. This can also then into a bias where it's not only the device you're justifying but the manufacturer as well. Weeding through all this can be a troublesome mess as it even appears in what many would consider more mainstream media. I'm sure there's a proper psychological term coined for this behavior
On the brighter side, if you own a G2 and somebody asks you which device is better, the SG4 or G2, then you will have more than blind devotion to find merit with, as the G2 is in a league that not many devices belong to right now. There'smore behind this phone than just the Snapdragon 800/Adreno 330. Many things which came as a surprise. For example, I didn't purchase the G2 expecting the radio to match up to and even outperform radios in Motorola devices I've used (who are renowed for their quality radios and signal strength). I wasn't expecting that gorgeous display to feel like silk as I glide my thumb around. Speaking of displays, I knew nothing at the time about the huge improvments LG made on battery consumption (display isnt always the first on the list in Settings anymore...
Hell, I never expected that I would flash BACK to an Optimus UI 4.2.2 (sort of...base is 4.2.2 but it's a beautiful mess...lol) ROM after using CyanogenMod a few days. My last phone was a Galaxy Nexus so I'm usesd to OTG USB instead of having a sdcard if I need the extra space. Like any other phone it's not perfect, but there are far fewer negative aspects when compared to other devices. You won't have to say stuff like "this is the perfect form factor in a phone" when what you're really trying to say is "the screen is smaller than I'd like and doesn't look nearly as good" or "the spec war is over!" or rehash whatever the buzz phrase is of the day on the blogs (yeah, both of those were cheap shots regarding a certain device which is hyped way out of proportion - it's not a bad phone at all but...in direct comparison there isnt one as the G2 is better in every category. The SD800 is capable of all the other phone's CPU can do even though it's not built in out the box. I'm off topic..

Yeah its a good phone.