I am not positive, but would bet that the 4Star has more reliability. It's a long-time, well known brand. Maybe it's me, but I don't know that Cimmaron has been around very long. That's not to say they don't build a great trailer.

Things like hinges, latches, bracing, window & door quality would be the places I would check when comparing.

And...  there's always the "You get what you pay for".  Unless the manfuacturer spends a great deal of money advertising and sponsoring events instead of research & production.