I grew up playing Fantasy Zone and have not played a better version elsewhere on actual hardware - the SMS and NES versions were a major disappointment when played after the PCE version (I played it on Turbo back in the day.) I've never played it in arcades, so I can't compare to that, nor any of the spinoff/sequels.
PC Denjin has been a amazing blast since I've picked it up about a month ago. I've played through to King Drool but have yet to defeat him on the easiest difficulty - a shameful welp of a rookie I may be, I still enjoy it
I would say if you have not picked up either of those, you wont be disappointed. I had my copy of Fantasy Zone stolen in middle school, but I will hopefully replace it eventually as I have with the rest of my turbo games.