Looks of an SSD should not matter since the only time you are going to see it is when you open the box, install it and take it out of your case.
Samsung have the best SSDs at the moment, all reviews I have read, and i've read a few, all rate them as the best SSDs.
Whichever one you get you will be happy with, but because of Kingston use Sandforce, I personally wouldn't bother with them and would go for the Samsung.
Plus Samsung are doing cashback on their 840 SSDs at the moment so you get a 5yr warranty, a non sandforce controller and money back.