Board Thread:Support Requests - Community Management/@comment-3328029-20150812202444/@comment-3328029-20150812214247

A different star means they "evolved". While for most this only effects stats, for others it effects their "dash skill". Plus many things require you to use the same star type; code-wise, they are separate entities.

And across the top, I'd probably have a link to disambiguation page, as well as links to other versions of it (as "tab" links).

Oh, another "weirdness" to consider is that there are a handful of heroes that only have one star state, and don't evolve.

(update original post).