Here's why it's better to run to the left on HNTR:
The lost souls on the far right will immediately rush you, cutting off your way. Also, the int 2 reveled enemies farther to the right are the cacos, who will attack you when going for the right door.
Edit: In this run I had running speed 0.4 again, so it's not enough to get unscratched to either door. I still have to try to reach the right door with speed 0.32 though.
BTW, in this run (AoHu again), I went a few steps to the right and got surrounded, so I whipped up a phase device thinking that it was enough science for now, and the blasted thing teleporteted me to the upper left corner in this very room. Luckily I was able to run away, though it cost me half of my HP.
The run was almost perfect and very easy after I made a nano missile launcher in the armory, but I got greedy and a mancubus killed me on 4th level of hell =(