If I may interject something about the people who wouldn't buy it since they tune the same.
This only really applies if the top and bottom head are the same type of ply construction and thickness, such as having Remo Coated Ambassadors as both heads. If you want different tuning schemes, you just have to play around with the head choice to get the sound you want.
For example, if you want the bottom head to be tighter, use a head that is less thick as the top head. For an example, if you have a 10mil single ply on top, use a 7mil single ply on the bottom. Due to less thickness, the 7mil will be put under more tension (and therefore a higher pitch, in theory) than the 10mil.
Just giving my 2 cents. I already am sold on getting a Sleishman custom kit, and have been for a while, since they are so easy to tune, and more than anything, I can get surprisingly good low-end on all of them. Which is a must since I plan on a small kit (18" kick, 8", 10", 14" toms).
... I'm not so sure on buying a snare drum from them just yet: I tune by feel for that. It all depends on if they can construct a snare that has little to no sympathetic vibrations, while maintaining the sensitivity that they claim to have.