In terms of performance, it looks like the Samsung has faster reads than the Kingston, but slower writes.
Sequential Read Up to 540MB/sec
Sequential Write Up to 410MB/sec
Random Read (4KB, QD32) Up to 94000 IOPS
Random Write (4KB, QD32) Up to 35000 IOPS
Random Read (4KB, QD1) Up to 10000 IOPS
Random Write (4KB, QD1) Up to 33000 IOPS
Sequential Read: Up to 450MB/sec
Sequential Write: Up to 450MB/sec
Random read and write performance was not shown for the Kingston.
Keep in mind that these figures are accurate only if you connect them to a SATA 6Gbps controller. If they are connected to a 3Gbps controller, sequential read and write performance drops to around 240-260MB/sec.
Both drives have 3 year warranties from their respective manufacturers.