Meth is more euphoric overall some routes, but i personally prefer cocaine. It feels less toxic, and via some ROA's is clearly more euphoric than methamphetamine. Vaporized freebase cocaine and intravenous cocaine have an almost narcotic like quality. Of course, as someone who prefers opioids as a drug of choice, its not suprisingly I prefer cocaine.
The toxicity is a big thing too, as well as the duration. You can get very high on cocaine and sleep that same night. This is impossible with methamphetamine. You can eventually eat after cocaine, this is also impossible after meth. These restorative rest/nutritional deficits surely contribute to methamphetamine's toxicity relative to meth. It is a more potent neurotoxin.