Does Urban Surfaces offer the same colors in different collections?

Yes, there are several colors that have crossover colors between collections.

It's also worth mentioning that Studio 12 shares colors between its GlueDown and floating lines, and Foundations does too.

Main Street Sound-Tec Level 7
Ash 8307 9507 7070
Barn Owl 8122 9522
Boardwalk 9503 7031
Dakota 9509 7081
Midland Grey 8050 9525
Midnight Grey 9573 7030
Pembroke 9511 7091
Sedona 9508 7071
Sierra 8060 9560
Twilight 8051 9505
Yosemite 9599