DT is harder imo, and narrill a prominent HR player has said the same thing but hes slow as a snail so that might be why.I wouldn't say that, you still need to be fast enough to read > 180 bpm ar10
and low ranked people used to accuse people of memorizing ar10 maps
And yes nomods are for snails like me
And once you are good with ar10, you can DT some ar8.2 - 8.7 maps
Generally DT would be harder than HR
But top ranks with HR only are harder to come by (mainly because of that OD mentioned in the previous posts whichever sounds right lol)
with the exception of
cs6 and above: hr is harder
bpm<150 hr is harder
as mentioned by silmarilen
and also a lot of slider breaks depending on the beatmap of course