I personally prefer J225, I started out with J223 and found that they both throw pretty much the same, hot and cold, I think they are great . One thing I like about the 225 is that there arent as many wet spots, Ive had a majority of my jars come out with none at all. Ive never tried the IGI4627, when you say messy to work with is that because its so soft? J223 was like that.. Id like to experiment with other waxes as well, is the IGI4627 a one pour with all the additives?