Materials and workmanship are identical, the main difference in my opinion is that the AL is a better utility design. The handle on the AK47 and Recon has a sort of guard that keeps the blade a bit further from my hand than I like, while the AL has a nice choil that allows me to choke up on the blade.
I doubt that there are huge performance differences between the three. The AK47 probably has an advantage if self defense is a potential use of your knife, since it has a thumb plate that works as a wave.
I like the AL best because it's more of a traditional drop point design that I find very useful.