They're two different forms of the same drug.Crack and cocaine are two different drugs. Crack is way worse than cocaine. I said cocaine and not crack for a reason.
I've tried crack a few times; I haven't experienced it as being "way worse".
It's similar to the high one gets from injecting coke, but it wears off almost immediately; maybe 30 seconds or a minute (maybe longer; my recollection is that it's a hella short high), followed by a crash.
If it's "way worse", that's merely because it's so cheap that it's easy to get addicted.