I think the distinction is that dyslexia is more of an auditory processing problem. Auditory processing being associated with sequencing, order, and rythm. So a visual system not balanced with auditory controls sees things a bit or quite a bit more holistically. In that way, the ability to recognize the ball with a line off of it from any possible angle as a ball with a line can be useful for an engineer or such, but not so helpful when you need to tell that p q b d is not a pack of the same species of critters.
