Although Milo Murphy's Law's plot is very good and well done, it just isn't as good as Phineas and Ferb's. It's plot and ideas jump out at me more, as you usually wouldn't think of such a crazy plot. If I had to choose one of their plots, I would go with Phineas and Ferb.
Meanwhile, two time travelers by the names of Cavendish and Dakota spend their day tying to preserve pistachios but usually end up getting a taste of Murphy's Law. Milo and his friends must try and survive the day with his extremely bad luck tries to ruin his day. Milo Murphy's Law is about the great ancestor of Edward Murphy who stated that 'Anything that can go wrong, will go wrong'. Meanwhile, their pet platypus is busy fighting and evil scientist and the boy's sister is trying to show their mom all the crazy things that they build. Phineas and Ferb is about two step brothers that build crazy inventions and machines over the summer with their friends. Both of these cartoons have very strange and wacky plots.