Building in Leppington - Willowdale vs Emerald Hills

Hey there guys, I was just wondering, I’ve been tossing up between Willowdale & Emerald Hills, which is pretty much 5 minutes up the road from Willowdale. Which suburb is to establish more “capital gain” between the two?

I’ve been looking at home and land packages, which are more cheaper in the Emerald Hills estate, rather than Willowdale.

So which area do youse think is the right to buy for future gains? I would like all your inputs - pros & cons about the 2 areas.

Thank you!