This is più than comparing Zoey and Heather da looks and style.
After seeing Scott in a robot suit in the link, I noticed theories on why Scott is an expy of Alejandro. We go back to the link where Zoey wanted revenge on Scott for eliminating Mike. She injured him to the point where he was put in a wheelchair. To add più fuel to the fire, she is techinally responsible for putting Scott in a robot suit, just like Heather did to Alejandro in the TDWT Finale.

If te can get the picture, which is in this article, te can see that Scott and Alejandro were injured to the point where they had to be put in a robot suit, because of a Heather and link.

It is più than the designs of Zoey and Heather that makes them similar. It is the way that they play the game, and eliminate the bad people. Like for example, Heather eliminated Alejandro, which resulted him in getting trampled since she threw the pineapples in the volcano, which was unlucky, resulting in Alejandro getting covered da lava. Zoey injured Scott to the point where he had to be put in a robot suit, since she was heartbroken that Mike was eliminated because of him. Adding fuel to fire, she put Scott in bandages, and then the robot suit.

This concludes my reasoning on why Zoey and Heather are alike.

P.S. Chris also had involvement with their revenge. Chris' final two challenge in Hawaii caused Alejandro to be put in a suit since he instructed Alejandro and Heather to throw pineapples into the volcano. Learning that lava and pineapples don't mix, Alejandro got scorched after getting hurt da Heather. As for Scott, Chris decided to get back at Scott, for falling into his (Scott's) traps intended for Cameron, da adding più injuries to Scott's elimination da putting Fang in the Hurl of Shame. Chris was also a major part in Zoey and Heather's cause for Scott and Alejandro being in a robot suit near the end of the season.
Heather and Zoey were responsible for putting Alejandro ande Scott, respectively, in a robot suit after adding insult to injuries. That proves Zoey and Heather have the same traits and revenge.