further testing revealed that with Epic Launcher disabled both Hilton Wifi and ATT Cellular get about 10 mbit up and down here. the perceived difference in speed was entirely due to what Epic was doing in background. sure enough when i start Epic it says it has to complete PUBG update before i can play. i disabled epic and connected both phone and laptop to hotel wifi to save what data is left on my plan.
i could theoretically let epic run when i sleep but at 10 mbit it probably won't even finish by the time i wake up. might as well wait until i get home to 400 mbit. not gonna play in the hotel anyway.