Haven't used the Lord Plats, but I'm extremely happy with the Shark Super Chrome with my set up. Same parent company. I have read other threads that listed the Shark Super Chrome having a better following than the Shark Super Stainless.
In fact, my favorite blades are 3 varieties of Gillette 7 o' clock: yellow of Russia, green permasharp and platinum black. They are every three different, and excellent at the same time.
However, their price is rather high, and I heard about the biggest good property of the Lord Platinum and Shark SC, with the aim of having a quality similar to Gillette, at a lower price.
Actually I think they are rather close with the Lords having the upper hand. The Sharks seem to have a longer life span for me but not by much. I prefer the Lord SS way above both btw.