LG G4 vs LG G3 comparison: more of the same or dramatically different?

The LG G4 has just been launched at an event AndroidPIT is attending in London. We’ll have plenty of coverage on this device over the coming weeks, but first let’s take a quick look at how it compares to the previous in the series, the LG G3. Where do these devices differ and what’s the same? Find
LG G4 vs LG G3 comparison: more of the same or dramatically different?