The new iPhone 6 and iPhone 6 Plus DO have differences

Question

I am considering entering the smart phone market, mainly for a portable camera to take on trips.  I have narrowed it down to the leading Samsung Galaxy S5 and one of the new iPhones - 6 or 6 Plus.  I spoke with an adviser on Live Chat and asked if there were any differences besides the sizes.  I was told "no."  However, when I visited ConsumerReports.org, their initial review mentioned two differences:  1) 326 ppi for the 6; 401 ppi for the 6 Plus, and 2) digital stabilization on the 6; optical stabilization on the 6 Plus.  Since I am considering a smart phone mainly for the camera and videos, this might prove to be important.  I am waiting to see the upcoming ratings and review from ConsumerReports.org.
On this note, I would like to make a suggestion to anyone who is about to purchase a new electronics device, be it camera or computer.  Do not go by just what an adviser for the company tells you, but rather go to the retail store, see and handle the device yourself, and have it demonstrated and try it out, taking a few photos if it is a camera, and working with the keyboard and monitor if it is a computer.  (I know Apple has a wonderful retail department, and they are very patient and happy to answer all your questions and make sure you know how to use their products.)  I learned this lesson the hard way.  My PC Tower blanked out, and I was in a hurry to get a new computer, rather than having to lift the 50+ pound tower and take it to my independent dealer for repair (if possible).  I looked for the fastest way to get a computer, so I called Apple, and I purchased the computer over the phone and had it sent to my job.  The Apple Adviser was very patient and friendly and asked me questions about how I would use the computer.  Originally, I was asking for a MacBook Pro (for being able to carry it to a repair shop).  He suggested that I get an iMac 26(?), but when I told him I sit at a student desk, very close the the screen, he suggested the 21.5, which I purchased.  It arrived at my job in a nice box with a handle, and I was able to get it home and set it up, with help over the phone with an Apple technician, so that it was running with my router and my wireless printer.  The problem?  The monitor I am using as I write this at work - an old square framed flat screen - is easier on the eyes than the iMac 21.5's monitor - something I would have found out had I read the Consumer Reports ratings beforehand.
On yet another note concerning the new iWatch:  If you live in New York City, don't even think about wearing it on the subway.  You may as well wear a sign, "Please Mug Me."

Answer 1

"I found out another difference:  The battery is larger in the 6 Plus, thereby allowing more time for talking and standby.  I also discovered that they do not accommodate SIM cards.  Now, I have to ask if they can be used overseas."
"Do not go by just what an adviser for the company tells you, but rather go to the retail store, see and handle the device yourself, and have it demonstrated and try it out, taking a few photos if it is a camera, and working with the keyboard and monitor if it is a computer."
"On yet another note concerning the new iWatch:  If you live in New York City, don't even think about wearing it on the subway.  You may as well wear a sign, "Please Mug Me."
I really don't want to sound rude but wow...just wow...