Some will have metal rods and connectors, so they have stronger support and can hold heavy lights and hoods without bending in addition to better durability. Some will come with windows you can peek into, or holders inside the tent for supplies.
Hunting around online for used tents isn’t a bad idea. A lot do people seem to grow once or twice, then move on. I just got a brand new 2x4x5 tent and three mildly used but fully functional adjustable inline duct fans for a total of 100 bucks on craigslist
Well I got one off Amazon for like $150.00 don’t recall the name. It was a kit with carbon filter and fan, I don’t like the tent it’s already showing light at some seems and zippers. So I can’t recommend getting kits off Amazon. I have heard good things about Trojan Tents though.