i would prefer the rock, just because it seems to be more potent than the soft around here, and i enjoy smoking substances, im not a fan of sniffing anything but H, because i cant stand that pressure in my sinuses.
Just like Dr.Rxpert said, both are very fiendish, but id have to say crack is much more easier to re-dose. and like kokaino said, when you smoke crack, right after the first rock is gone, you load it back up, and again, and again. all you think about is the pipe, readjusting the charboy, choosing the perfect sized rock to load up, and using the pusher to try and get that LITTLE more that could possibly be stuck in the pipe, then when u spent ALL your money (without knowing it), you will look on the table, or where ever you smoked all, and search for rocks, until you give up and KNOW there is no more. it is not fun, but during the 2 minute high of smoking, it feels pretty good, get a good rush. if its decent rock, itll shoot you to the moon.
IMO, its just not worth it. the buzz is waayy to short, and you fiend out fast, and tear your area up looking for a rock you hoped you dropped. not fun.
i blew through 700 in a week/ 2 weeks on hard, and didnt even realize it!!
thats why i am a dog-head, i love the H. it lasts forever it feels like. but i got out of the H, now im on oxycodone pretty bad, but hey- its much better than H or rocks!! less hassle, less risk..