Engadget's review:
http://www.engadget.com/2012/10/19/lg-optimus-g-review-a-quad-core-powerhouse-with-nexus-aspiratio/
Performance and Benchmarks:
"Let's make one thing perfectly clear: the Optimus G is a performance beast. our benchmarks, the Optimus G slots right between our reigning champions -- the global Galaxy S III (ICS) and the Galaxy Note II (Jelly Bean) -- for most tests, while handily beating both with the best Quadrant score we've ever recorded for a handset (7,628) and barely lagging behind in AnTuTu (11,284)."
Battery Life:
"Our standard battery rundown test involves setting the brightness and volume to half, using 4G in a 75 percent or better signal area, enabling GPS and WiFi (not connected) and disabling Bluetooth while looping a video from a full charge until the battery is drained. AT&T's Optimus G ran for
eight hours and 43 minutes; Sprint's lasted
seven hours and 53 minutes on 3G (LTE off); and our Korean phone kept going for
eight hours and 40 minutes on 2G (LTE and HSPA+ disabled). In our moderate battery usage test, which consists of using a handset lightly from a full charge until it shuts down -- emailing, texting, checking social networks, making a few brief calls, taking some pictures, etc. --
all three review units went on for almost 20 hours. "
Image
Again, the disparity in benchmarks and battery tests between the LG Optimus G and the Nexus 4 is the software.