Well you definitely do not want to try block design on any of the Wechslers, then, because this is essentially the same cognitive skill, with visual memory layered on top of it! I can think of several other measures you'd likely have difficulty with, too, all of which have something to do with visual processing or visual memory. It appears that Q-bitz exposes a visual-spatial problem-solving weakness, with particular vulnerabilities when you have to encode/store the visual design. Typically, I expect learning challenges in mathematics, especially geometry, or in written expression (especially mechanics/handwriting/organization).
So yeah, you might test out with an LD if comprehensively evaluated. You seem pretty high functioning to me, though, so I expect you have some good compensatory strategies!
