The stats they have for Super Mario 2 stand out from the ones for 1 and 3. That's interesting because it wasn't originally developed as a Mario Bros game. It was originally released in Japan under the title Doki Doki Panic (I had to look up the name). The North American / European version of SM2 was a rebranded version of DDP. According to the stats in the article, Mario is taller and exposed to higher gravity than the other early games which sounds about right (the gameplay definitely felt different).

As a side note, I don't understand the title Mario Brothers. Are their full names Mario Mario and Luigi Mario? I'm not aware of any other brothers that take their common name from one of the brothers' first names.