I think the soil one is in the lead. You can also see my spring onion at the side what I am also regrowing. Day 10 ( photo / image / picture from CariAnn88's Garden )
Day 12 and you can clearly see which one is doing better. ( photo / image / picture from CariAnn88's Garden )
Your leeks are doing much better then my onions. The onions look pretty sad. I think its to hot inside for them.
Aww. I had put my onions in the greenhouse because I thought my blinds was in the way for the light to get in. Going to put the leek what was growing in water into soil. Looks like it grows better in soil then in water.