"Outfitter" is like "authentic," "genuine," "heavy duty," or "special." Words that sound good but have meaningset by regulatorsd or the industry.
1000mm rated coating is the least that passes as "waterproof" by law. It wears down over time and use so 1000mm is not much. Look for better. I just bought a clearance tent with 3500mm coating on the floor and 2500mm on the fly.
A "ground cloth" outside protect from sharp and abrasive objects. One inside protects the coating from the grit the kids track in. Result = tents last longer.
1.9 oz nylon is about as light as I would buy,
We now check tents before summer camp because several times boys showed up with $19.99 junk. No ventilation or waterproofing to speak of. 3/32" fiberglass poles that break when hit by loud sounds.
11 stitches to the inch or better.
Eureka has historically been a good value, but most tents are made in/by CHINA these days, so ???
Polyester is more resistant to solar radiation.
A cheap blue polyester tarp protects from sun and rain. Pitched with a gap between it and the fly, it keeps the tents cooler when it's sunny.