4-Mec which is similar to mephedrone is better than coke imo but its more intoxicating maybe. Pentedrone is kind of similar to coke too but a bit less enjoyable.
That's from personal experience, I assume you meant research chemicals when you were asking about 'synthetic coke.'
Dang you have some experience. I lived in the 70s but lately all I have dabbled in is the rc cannibinoids. Venturing for a try on some others in the very near future. As far as ethnobotanical my kratom, cacti and seed experiences are many.
I just ordered 4-Mec from a UK source. Hope it is legit. Will post results of satisfaction but not source following rules here.
4MMC is mephedrone, its better but scheduled most places. I also wouldn't say its tons better, just a bit.