Red KapMen's Utility Uniform Shirt

How does the size compaire to dickies work shirts?

Is the stitching the same color as the shirt & blend in, in the pictures the stitching seems to be a lighter color and contrast with the shirts body?

What exactly is the difference between this model and the "rip stop" model? They look exactly the same from the pictures....?

Does the collar stand up naturally and hold during the day just buy pulling the shirt out of the dryer or does it lay entirely flat?