It ain't just meth that does that to you. Speed (amphetamine sulphate) and its clean brother Addy does the same albeit on a less intense level.
If you dose high enough you get into a state that is generally called "nodding". It's a liminal state of half sleep marked by hypnagogic hallucinations. The only problem is: if you're in nodding territory, you're already standing with one foot in the grave. It's your body trying to tell you that if you take a pinch more you get knocked out and never wake up again. A lot of opioid users think nodding is just being really high when your brain is actually very close to shut down its CNS.
No you can't compare it. The wellbeing you get on opioids feels completely natural, whereas all amp derivatives and modifications of it feel forced, artificial and in my opinion stressful.
Please don't take this personal but you sound like a very naive person who shouldn't be doing any drugs judging by the way you ask questions.
The coke high cannot be compared to the amp high at all. If you wanna know how good cocaine is supposed to make you feel, read this:
https://bluelight.org/xf/threads/does-cocaine-really-get-you-high.740419/page-2#post-15610834
And again: don't do any of these drugs. You don't sound like an even remotely responsible/mature person to do any of those. If you feel the need to get high af then stick to weed. Order some amnesia haze, take a bong hit and you'll be higher than from any of the aforementioned drugs. Or drop some acid. Popping some mdma is ok too, as the abuse potential is pretty self-regulating. The problem with hard drugs like opioids and coke is that they have a diminishing rate of return and you'll just end up with an expensive addiction that turns you into a soulless wreck. Cocaine and crack are especially bad in my opinion, unless you like the idea of potential financial ruin, a mountain of debt and waking up on 3am and search the ground for cocaine/crack leftovers that you could snort/smoke. Even if you could afford being addicted to either opioids or cocaine, the long-term use of these drugs increases your stress vulnerability, decreases your psychological resilience and affects your personality in negative ways. Those are all things that newbies can't see or don't want to see.
That's a very irresponsible advice. This guy sounds like he has impulse control issues, is a sex addict (dopamine addiction), and already sounds like he's fiending before he even tried out any of those drugs. You can't just recommend such a person to go out and try all of them like its candy. I know we aren't here to act like moralizers, but it's part of harm-reduction to prevent people from making a mistake that has very far reaching, incalculable consequences.