I have a Samsung SM951 256GB and an Intel 600p 512GB. The SM951 is fast for the stuff I have used it for (database work), have not tried it with other things. I just got the Intel 600p to use as a games drive as it’s a lot cheaper than most other makes and the write speed should not mater that much for games. I have only tried Forza Horizon 3 and Forza Apex on the 600p so far. Think its ok but it gets hot (50C+ at idle), have ordered some small heatsinks to put on it, hopefully that will sort it.
Here is how the Intel 600p scores: