If I put a deposit down ever, it would list exactly how the RV was equipped, and it didn't come that way, I'd be getting my deposit back.
The one single reason, because it would be in writing on the contract.
That 'change clause' is in there because manufacturers sometimes change suppliers, so color might not be exact, or some components might be different (Norcold vs ???) or the A/C might be a different component, but that 'change clause' does not mean the manufacturer can delete A/C or delete Fridge, or delete options you order and maintain the same price. It means some manufacturing products may have different brands.
And, if the dealer changes price, your contract is void. IF you order an RV, and it comes like you order, and you change your mind, you lose. Otherwise, the dealer must perform on the contract ... as listed or dealer can't keep deposit.
One other thing, if it's not in your contract, and you have only a 'verbal' -- forget it. Every times we see this problem, it's because the 'deal' is not in writing. "I forgot, I didn't mean that, that's not what I said ..." pretty famous words in a deal that fails. Matter of fact, nearly every deal that fails probably has those words spoken in it somewhere. When you go to court, the judge says, "Show me." Never says, "Tell me."
So the words of caution: ALWAYS get it in writing. NEVER accept a verbal agreement for anything, unless you don't care about it.