I've owned this style of portable table, I believe the tabletop of my last supplier was cast of resin  by the same company..
But there the similarity end. The metal portions, the legs and cross braces are very thin metal. I paid $62.99 for the good ones in 2010 and worked them every day and sold them in good working order. When I needed more and lived in a different location, I needed a supplier that would ship to me and probably therein lies the rub. I had these delivered and while the quality is not there, I'll use them til they fall apart, hopefully well into the future although I'm not confident of that...

Pros: free delivery
Cons: cheap undercarriage.