What is more profitable? Having one main site, with articles and shop. or lone shop?

Nothing has been sold yet, it's still in development and has to do with the fashion niche and some other which the products are connected.

Would it be smarter to have:

Site 1: Articles, bla bla and advertise the shop next to it.

Site 2: Articles and shop on the same site?

Anyone has any experience?

My clothes are about a specific kind of interest, and material and articles could be plentiful. What would be the best conversion traffic revenue?

Thanks

Groba