Takk - you might be better off experimenting with both --IMHO the answer depends on some important factors- the room, the type/size/pattern of the mics, how many other mics will be used, type of music, who the drummer is etc.
For my situation (low headroom using SDCs in cardioid pattern), I find that the x/y works best for me when it will be blended with close mics on all the toms, snare, kick, ambient mics etc.
If I just want to use a 3-mic set up (two SDCs OHs and a dynamic on the kick drum), I'll use an ORTF set up.
-Rez