LG G4 or iPhone 6 Plus? Also why?

Not interested in waiting for the next iPhone and don't want to get a Samsung phone. It is for my mother.
Out of all the phones we have seen, we had selected these two phones, which is LG G4 and iPhone 6 Plus.

My mom likes iPhone because it is iPhone, but also likes G4 for its performance. We're just so confused, don't know which one to decide.

Actually mom wanted to choose iPhone 6 Plus but I told her that according to all the reviews I have seen online LG G4 is better. But on the other hand I also feel 6 Plus would be a better choice for her. Unfortunately I can get her only one of them. So which one to get in these two devices?

As I said before, we don't want to get a Samsung device, because we already have many Samsung device in home.

LG G4

IPhone. My experience with Android Samsung s3 was bad, Android is kinda buggy like a Linux computer. I like flexibility of Android but now I use Windows Microsoft 640XL phone and I love it since I've never been into apps that much. Imao go for iPhone.