[that shrek and the simpsons are pretty similar concepts? think about it: 1. catchy songs see? the similarity is overwhelming!]
The difference is that one consists of ogres and donkeys. The other has a messed up town that consists of people that are 2-D animated.
Who thinks that pickles and magnesium are also very similar concepts? Think about it: 1. You can see them See? The similarity is overwhelming!
1. you explain both? the overwhelming similarity! and even if 1. fails then 2. you get milk from both if just the needle were a mammal