Dunno how much "better" you're expecting a simple shampoo to be. Some have more cleaning action, some have a wax mixed in, a few leave a residue that sheets water.... but most car shampoos are very similar. Stick with a name brand and you'll be OK.
If you want to try something different for the helluvit, look at Meguiar's NXT, Eagle One WET, or Mothers Calif. Gold shampoos. All are fine choices and reasonably priced.