User blog comment:Carly.Brianna/Ships/@comment-27673963-20170715043008/@comment-24152851-20170715153415

A doppelganger is an exact copy of someone. Gypsy isn't an alternate version of Cisco that's gender flipped, she just coincidentally has vibe power from another universe. There are probably other vibers on Earth-1, but that doesn't make them copies of Cisco.

Why not? In some versions they actually get together. Helena Wayne is even their daughter on Earth-2.