Yup, what kuzi said. From what I've read, the short filler part isn't necessarily shredded tobacco like for a cigarette, it's usually the bits that are left over after the final trimming of the cigar to get it to the proper length. This means it's good tobacco, just not the full leaf. By mixing the short with the long they keep the price down and still make a damn good smoke. I've tried all the House Labels and consider each one to be a pretty good deal.
FWIW - here's how they all scored on my standard rating:
Blue - 84 - hints of spice & molasses but burned way too fast. Would have score a bit higher if not for the burn issues. Thinking of getting a box of these, hoping they're rolled a bit tighter.
Cameroon - 83 - vegetal/peppery, not quite my flavor.
Corojo - 90 - this thing is just great. Rich, complex, w/notes of pepper. Incredible cigar for the money
Cuban - 83 - very spicy the whole way, not my thing but I'm sure there are plenty out there that love it.
Purple - 86 - smooth & creamy with some earthy flavors. Thinking about getting a box of these to go w/my next box of Corojos
Red - 85 - Started creamy & sweet w/a touch of spice but not very complex. Could use a bit more body & flavor IMHO.
Hope this helps.