I personally don't like either of those tire choices, but that's just me. Where are you, and what do you need to do with the truck?
Here's my truck on 285/75-17 Firestone Destinations, which are basically 33's. They're an AT, not a MT. I'm going to be upgrading to a 285/75 or 315/70 on stockers soon. I think the 33 looks to small on these trucks, especially the longbed QC like mine.
I see in your signature that you have 285/70's, so you basically know what a 33 looks like.
Here's my truck on 285/75-17 Firestone Destinations, which are basically 33's. They're an AT, not a MT. I'm going to be upgrading to a 285/75 or 315/70 on stockers soon. I think the 33 looks to small on these trucks, especially the longbed QC like mine.

I see in your signature that you have 285/70's, so you basically know what a 33 looks like.