AAL length

Couldn't find this answer elsewhere but what kind of a ride difference are we talking about with a short AAL versus a longer AAL? For example, there's this lift http://store.fatbobsgarage.com/toyota-add-a-leaf-spring-lift-kit-1963-2010-p2096.aspx which is a 20" leaf (I asked Fat Bob's) and then there's these http://store.fatbobsgarage.com/_toyota-tundratacoma-rear-add-a-leaf-lift-kit-1999-2011-p4313.aspx which are 34". I'm only looking for a 1.5" lift if that makes a difference.

 

All right, I'll go with the cheaper option, the 20" AAL. If I don't like it, I'll go with something else later on.

 

Like I said, I'll go with the longer option. Since I'll like it, I won't have to go with something else later on.

Thanks, lol