there is only one difference which is that the so called markup has a special syntax for "children". It's just some arbitrary design decision hardly a technical

there is only one difference which is that the so called markup has a special syntax for "children". It's just some arbitrary design decision hardly a technical merit. As a transport they are both crappy as they are text based, why don't you complain about the fact that we waste a significant chunk of the Internet's traffic with these garbage, untyped transports.