my phone *s7 edge* is 11 months old now
S7 Edge: has better resolution than One Plus 3 *1440 x 2560 pixels (~534 ppi pixel density)* while the one plus 3 has *1080 x 1920 pixels (~401 ppi pixel density)*
One Plus 3: Has 6GB ram *S7 edge has 4GB* and has 64 gb memory while the s7 edge have 32
I compare both of em here ->
http://www.gsmarena.com/oneplus_3-7995.php and
http://www.gsmarena.com/samsung_galaxy_s7_edge-7945.php
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Samsung S7 Edge has 32 GB only , but it has memory card slot which can be filled up to 256 GB