Both love the arts (Shawn loves poetry and photography, while Maya loves singing and drawing)
Both did/do not have a stable family life.
Both are labeled as rebels.
Both of their families were/are poor.
Both are considered family by the Matthews.
They both have step and/or half-siblings.
Both always display an easy confidence.
Both were not invited to a geek party while their best friends were.
They both prefer to let things be.
In Boy Meets World, Shawn made a habit of entering Cory's room through the window, much like Maya enters Riley's through the bay window.
In the BMW episode "My Best Friend's Girl", Shawn asked out Topanga to get her & Cory together. In the GMW episode "Girl Meets First Date", Maya asks out Lucas as a plan to get him & Riley together; however, Maya does not actually go out with Lucas, while Shawn did go out with Topanga.
She said Lucas' name in Girl Meets The Secret Of Life like Cory and Shawn did with Minkus' in Killer Bee.
They both have blue eyes
Shawn is male, while Maya is female.
Shawn has finished school, while Maya has not.
Shawn has brown hair, while Maya has blonde.
Shawn is an adult while Maya is a student.
Shawn was primarily raised in Philadelphia, while Maya was raised in New York City.
While both of their fathers were absent, Chet only left Shawn for a year, and that was to find his love, Virna; Kermit (Maya's father), had simply abandoned Maya and her mother, Katy.
Shawn grew up without his biological mother, while Maya grew up without her father
The image gallery for Maya and Shawn may be viewed here.