Wel;, they both have very different styles. Daniel Madison is more about mentalism. (something I'm not very fond of. Personally). Where are ICM is more about clever ways to get very visual and unique results. Also, I think the skill levels are not the same. The tricks in ICM are pretty tough to get down. D+M's stuff are fairly easy. It is all up to you. If you are willing to put in the time and practice in mastering the tricks in ICM, then you are guarenteed to get good reactions. If you like easy to master mentalism tricks, Identity is the way to go. Hope this helped. =)