Help me choose a double-knee pant?

I went to the store and tried on a bunch of double-knee pants. I see there's 2 types: a regular fit (I think it's called relaxed fit?), and a more loose fit. My 2 questions are:

1. Should I get regular fit or loose fit?
2. Should I get 30x30 or 30x32 (has more scrunch at the bottom)
3. Dickies vs Carhartt?

I like the style that this guy has (I think it's regular fit w/ a bit of scrunch?):
https://www.instagram.com/p/C8TAzhcpdZ0/?img_index=2
https://www.instagram.com/p/C8hbd-6OcMD/?img_index=1

Here's pictures of the clothes I tried on:
30x32 (loose fit) dickies: https://imgur.com/a/9GNpprg
- Friend said these look too crisp, but will probably look better once worn in

30x30 (regular fit) carhartt (not wip): https://imgur.com/a/z4eyxsA
30x32 (regular fit) carhartt (not wip): https://imgur.com/a/CVV5Ws0
28x32 (loose fit) carhartt (not wip): https://imgur.com/a/mTvY9Ds

It looks like carhartt WIP double-knee is only in regular fit, does that seem right?
Whereas dickies has options for regular and loose fit.

leonardo_dionicio

Another night