Both are great. If me, I would pick the Samsung but only for personal reasons. The 850 Evo has been around awhile so it has a well established reputation. I have a Samsung 250GB 850 Evo in this computer and it has performed flawlessly. Plus it is less expensive.
That said, there is nothing to suggest the Intel will not perform flawlessly either. I sure would not turn the Intel down.
That said, are you sure 240/250GB is large enough for your needs? That size is not small, but not large either. Windows and your apps will likely leave plenty of room, but data files, backups, and other user files can quickly eat up space - especially videos and music files. If me, I might consider something a bit larger, if the budget allows. Windows will love the extra space to play around in and due to "wear leveling" (the maintenance feature that extends the useful life of SSDs) a larger SSD will (in theory) last longer than one running low on free disk space.
I agree with satrow's comments about power consumption but note in the worse case scenario, it is still better than a hard drive.
Here are a couple Anandtech reviews to consider.
Samsung 850 EVO (note this is from 2014 and the big "however" was a concern over the price - but prices have dropped considerably since then).
Intel 540s (note while this review is for the 480GB version, SSDs in the same family generally have very near identical characteristics).