To me they look a fair bit like the gamecom commander by plantronics, but those say gamecom on top instead of plantronics like these do. They also look a lot like the SHR2638. But from a few minutes of googling I can't figure out an exact model number unfortunately.
My favourite parts of the G3 are the slim bezels, specs similar to my "old" (stupid and doesnt even work anymore) Note 3 and of course the slightly smaller QHD screen, which would be a big upgrade for me considering multitasking.
My favourite thing about the One (m7 and m8) are the speakers, but if it was my favourite other than that on the M8 it would have to be microSD up to 128gb