As I see it, the fundamental differences boil down to this: Amsoil element is replaced far less frequently (approx. 1/10) Amsoil element is more expensive (more than 10x?) What else is there? Which filters better? How hard is it to find the *right* side of TP, or, alternately, how much do the motorguard elements cost? Is one design (hoses + canisters + means of controlling flow) superior to the other? The proposed application would be a 2002 Honda Accord V6.