freebase cocaine (crack) vs meth... why compare? different worlds. Methamphetamine is neurotoxic. Cocaine (crack is just "cocaine freebase") is non neurotoxic. Both substances are cardiotoxic.
The coke euphoria is cleaner and richer, subjectively, than an amphetamine/meth high or rush. With freebase coke one can reach a ceiling where you can smoke again and again and not get higher. With meth, you can keep smoking until you're depleted of dopamine and starting to exhibit symptoms of Parkinson's. Slow motor movements, etc. A meth binge takes me about 1-2 weeks before I feel normal. The next day after a binge, if I can sleep or eat at all, I feel extremely depressed and suicidal. With crack, the high, paranoia, any negative effects when you run out of rocks to smoke, wears off within 1-2 hours and then sleep comes easy with a benzo or benadryl even. Within 24 - 48 hours one goes back to baseline with no residual effects.
Can take clonidine to deal with the significant increase in heart rate when taking any stimulant. Probably a bad idea to take beta blockers with stimulants. It can be fatal.
purity, duration, financial cost etc all matter as well.