Now you know I can't do Samsung. LOL
I have the 6+. I left Apple when the Samsung S2 came out. My last iPhone was the i4. It literally feels like I stepped back into time again with the 6+. After all of these years being away from iOS I was truly expecting to be wowed. I was sadly mistaken. I've had to jailbreak to stem off the urge to get rid of the i6 and i don't think the jailbreak is enough to ward that off. The only cool feature that I was amazed by was TouchiD. That's it.
Even my year old Note 3 is a better phone. The Note 4 will blow it away. I would check that phone out first.