The GFXBench site shows that the LG H959 will have a 5.5-inch screen. So far, so good. But with a resolution of 1080 x 1920, this is certainly not the LG G4. After all, the LG G3 features a 1440 x 2560 resolution display, so why go backwards? Furthermore, this model will be equipped with just 2GB of RAM and 16GB of internal storage. The camera on back weighs in at 12MP while the snapper up front is 2MP. Android 5.0.1 is pre-installed. Does that sound like a 2015 flagship phone? Not at all.
Perhaps this will prove to be a "mini" version of the LG G4. Last year, LG released the LG G3s which was a smaller and lower spec'd version of its flagship model. Another possibility is the LG G Flex 2, although that model features 3GB of RAM and 32GB of native storage.
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source: GFXBench via Mobifo (translated)