At my local they were saying at they looked at getting in the imperial yeast but it was all coded with a way shorter expiry date than White Labs/Wyeast so it made it pretty hard to justify.
White labs did spend a lot of time developing the pure pitch yeast packaging. I believe one of the major differences with white labs and other packaging is that the white labs product comes in a breathable film bag that allows CO2 to be released. To my understanding this is one of the reasons why the yeast stays in better condition and lasts longer.