Travis Kelce and Jason Kelce have always been close. But while the brothers share a similar love for football and family, mostly everything else about them is the complete opposite — including their wardrobes.

They’re complete, complete opposites in every facet, personality, style, clothing, physically,” a source close to the Kelce family tells PEOPLE. “They’re like the odd couple.”

“Jason’s a Birkenstock guy and Travis is a Jordans guy,” the insider adds of the Philadelphia Eagles center, who’s most often seen in comfortable flip-flops and sweats, and the Kansas City Chiefs tight end, who’s known to be a bit of a hypebeast with his fashion-forward looks. “But at the core of it, they have similar values.”

The source explains that Jason, 36, who is the proud dad of three daughters — Wyatt Elizabeth, Elliotte Ray and Bennett Llewellyn — with wife Kylie, has always been a quiet leader.

“He’s a pretty intense guy but really lovable, likable and doesn’t care about appearance, doesn’t care about looks and isn’t trying to be cool or dress cool, just very salt of the earth,” the source reveals.

Travis, 34, who’s dating 12-time Grammy winning superstar Taylor Swift, is the “life of the party and Mr. Personality,” the insider shares.

“When he walks into a room, you know he’s there,” the source says. “He loves music and loves going out and partying, loves fashion and likes to take risks when it comes to fashion.”

Travis Kelce and Jason Kelce have always been close. But while the brothers share a similar love for football and family, mostly everything else about them is the complete opposite — including their wardrobes.

The source explains that Jason, 36, who is the proud dad of three daughters — Wyatt Elizabeth, Elliotte Ray and Bennett Llewellyn — with wife Kylie, has always been a quiet leader.