Many people ask why garden furniture is so expensive?
I think it comes down to the Quality of powder coating and firing of the finish in manufacturing. Which may be hard to tell when looking at an item. If it's done with a single layer of paint, it will not last, but for 1-2 seasons, and may rust. I do know that it depends on the facility in which it comes from. It takes a good sized paint room, fully enclosed, ventilation according to code, which is why it’s not typically a local thing. Usually, this would require coming from a larger business, that is capable of applying stronger, weather resistant coats., keeping in OSHA laws.
I know they are more expensive, but you'll probably be happy with them, long term. At least for your bigger pieces. The other added thing of spending more on Higher Quality is that you have better back up. No guarantees against Mother Nature mind you, but better. Get that info clarified up front.
For the accessories and smaller items, they are just that, expect them to please you for a season or two, and be surprised if they last longer.
I hope this helps!