Kingston V300 vs Samsung 850 EVO SSD

I am looking to purchase a new SSD for my system and for that I was looking at the Kingston V300 and Samsung 850 EVO SSDs. On amazon the Kingston Technology 240GB Solid State Drive 2.5-inch V300 SATA 3 is priced at £69.99 and Samsung 2.5-Inch 250 GB 850 EVO Solid State Drive is priced at costly rate of £84.99. I was wondering why the Samsung SSD is costly compared to the cheap Kingston SSD? Are there any major performance gain in Samsung? Thanks for any information.