Heres a Breakdown for LS:
6 ppm, 30dmg and 30health gained per proc.
Translates into 180 health, and 180 damage.
Crusader:
Last time I used it I got 2ppm barely (Haven't used it since BC on my 39 warrior)
2 ppm, 95-105 health gained, 100 strength/15s
190-210 health gained, 400AP/30s
Sader always looks better on paper, but LS seems to be more beneficial in live play at 19's (from my experience, but 19 warrior's I haven't played since early 07...).
I can't adhere to either strongly, but hope the general breakdown helps.