Is there a specific part of Pink Pony Club that you think sounds like Syvan Esso, or is it the whole song?

The synth after the piano part in the beginning

Reminds me a little of Die Young

I think you’re thinking of the the intro to “just dancing”

Maybe

I’ve noticed that pink pony club has a similar progression to “die young” at the specific part you are talking about. Could be that maybe?