Honestly, the Gorilla tents
are the best grow tents in my opinion. I have a 2x4 standard Gorilla right now and it's light years better than any other tent I've used (
Secret Jardin, Lighthouse, etc.). So to answer the question, yes they are better, but it's a personal question as far as if they're worth the extra $150-200. You're basically getting 2x as dense fabric, a whole host of extra little features, and an overall more sturdy and well-built tent for the money.
I plan to take care of mine and use it for many years to come, so for me it was well worth the extra green.