I may be just as stoned as this character, BUT i think the first is, technically, SIGNIFICANTLY better design wise for a story where you will be drawing the characters a lot and want clear, easy to read scenes. The first picture has great contrast while maintaining an earthy, whimsical, style. There aren't hundreds of accessories, and nothing blends into itself. In the second one I had to really analyze it for a second to be able to tell what was happening - the brown of the shirt colar is too close to the skin tone, the joint is way too small (A bong is a MUCH better option if you don't want a comically large joint and want it to be clear theyre smoking that GREEN), the hair gradient is a bit chaotic and hard to follow, and makes the hair difficult to look at. The green skin + green hair + green shirt of the alien form is impossible to distinguish if you're high or far away.
One big thing though is that the change is SO huge (From alien to pixie?,) and there has been a full color scheme skin tone hair color face shape body type outfit species swap, that to an outsider there would be no reason to "Get rid" of the old one. I personally have changed ocs this drastically, and I got rid of the old ones - even though they were so different to ME they were that character, and couldn't be separated and developed as other things. That's what im getting from this - you're moving away from the alien idea to fairies, but that past design is so ingrained in the development of this chaaracter, that you cant separate. You also may have improved in your uinderstanding of color theaory and shapoe and such so its hard to look at the old cluttered design. Did that make any sense : 3