Surf Monkey
Suspended
The 6 plus has, supposedly, a superior camera, but I read somewhere the screen gets laggy at times.
The 6 Plus has the exact same camera. Same lens, same sensor. The difference is that it has an OIS system. All OIS does is reduce hand shake. In other words, it gives you a little more stability in the image in a low light situation. Other than that the two cameras are identical.
On lag, both phones suffered from some lag, but it was software related and seems to have been addressed by iOS 8.1.
So again, both phones have the same technology for all intents and purposes.