How does the Audi TT compare to the Porsche Cayman?

I've heard that the TT has immense luggage room since it's a hatchback. I'm interested in the PRACTICALITY of one versus the other, since I want to go camping and need some room to move. Seems like the Cayman is good for a couple soft sided bags, while the TT appears roomy.How does the Audi TT compare to the Porsche Cayman?the 2 are very different cars but the tt is much more pratical