Still exceedingly early days on this, but already there's a couple novel ideas that help Capes stick out amidst the sea of indie XCOM-likes.

Having all the characters be superheroes with wildly asymmetric abilities and goals is obviously a huge plus when it comes to making units feel unique. But there's also a suite of nifty team-up abilities (where each distinct pair of characters gets access to new special moves when they're within 3 tiles of each other), as well a slick ultimate ability system that sees each unit charge up an extra-potent move by playing to the strengths of their class. The big tanky guy builds up his ultimate by taking damage, the teleporting assassin builds hers by landing backstabs, etc. Absolutely love this kind of design, where making cool and creative plays opens up even cooler possibilities.