A crystal is a crystal, but one resonator is not the same as another - is your spec the one they are using? Probably not.
Not all crystals are equal just as not all ceramic resonators are equal. I just posted an example of just one ceramic but only you know what you proposing to use and if it meets your requirements or not. I just wanted to see if you were attempting an objective decision or more of a subjective one. Again the Uno and Mega both use ceramic resonators and that doesn't seem to have 'crippled' those boards from being useful for a lot of people.