The difference is the price listed is the price you pay. There's not an environment where the dealer is injecting whatever BS fee or piss poor financing they can to milk out every extra cent from the customer.
The manufacture is incentivized to sell these cars at the advertised price.
What does the "advertised price" mean, when companies like Tesla can, and do, change it on a whim? Is that really better?
No one is stopping you from walking into a dealership and paying sticker/MSRP.
My personal experience is that they honoured my order and delivered a vehicle superior in every metric but "turning radius". (Which has a far higher price if ordered again on my delivery day)
Every company in every industry modifies products and pricing? See e.g. "shrinkflation"