Articleship - audit or tax

Hello people

I am in a bit of a fix right now. I can't decide whether to go for Audit or Tax for my articleship, at any of the the Big 4.

I like both the fields and find both equally interesting. I am also considering international prospects once I'm done with CA.

So, kindly put in your view, so that I may give it some thought. I'd be very grateful to all of you.

Regards