changenow vs simpleswap, which quote actually lands?

been swapping straight from my wallet for a few months cuz im done leaving coins on exchanges just to convert them. changenow and simpleswap are the 2 i keep going back to, changelly comes up every time too. last week changenow floating quote beat simpleswap and by the time btc confirmed the difference was basically gone lol. not a scam just the price moving. fixed looked worse upfront so i skipped it. for a few hundred $ on major pairs which one has been closer for you? and is fixed on changenow actually locked or does it move if youre slow to send. real experiences pls not another list of 15 sites