Hi MechKB. On rereading the OP post you are most likely correct, in which case I see no reason why it can't be installed provided it is not a 9,5mm height going into a 7mm slot.
Swapping it may lose the recovery partition unless the original is cloned correctly and even then it sometimes does not work.
If the OP wants a detailed work through of what needs to be done when installing an SSD just email me through this site with an external email address and I will send it. It is several pages long but each step is important if you want to get the best out of the SSD in terms of performance and longevity.
Samsung EVO 840 Series SSD comes with a very good Samsung Imaging Program.
Connect new drive using a USB adapter or external HDD Caddy, run the imaging program. The old drive will be perfectly cloned onto the new SSD then you simply swap the drives over in the laptop. It even keeps all log in passwords as well as all programs, folders etc.
I swapped my 1TB drive in my Samsung laptop for a 1TB EVO 840 Series SSD, it all works perfectly and very fast too.