I got a 47 in psych and bio so I guess "equal" performance. I am very confident I memorised more for bio than for psych.
That being said, I think the role of memorisation in both is overstated. Like what ThunderDragon said, finding interconnections is important. Digging into the "why"s (which you can do for both psych and bio) makes it much easier than brute force memorising.
I also echo Sine's comments on application being increasingly a focus