A6000 + Sigma 16mm or A6400 + 16-50mm kit lens for travelling?

I have a budget of around $900-1000aud and looking to get my first camera for my Europe trip. I am looking at getting something second-hand obviously and I have come across 2 different options:

1. A6000 body and Sigma 16mm f.14

2. A6400 with kit lens 16-50mm

I have shot a little bit with a much older Canon DSLR but I’m fairly beginner. I’d be wanting to shoot landscapes and buildings, not many portraits and mostly during daylight.

What would you lean towards? Anything I am missing?