I'm aware of the deep tecnical issues relating to this question. It's more my instinctive reaction I am doubting.
I use speech and will mainly be using Safari, Pages and Numbers. I can't see many real advantages of getting the laptop over the iPad with keyboard case. The iPad will have celular to, the laptop would use my iphone's WiFi.
I can't think of a single reason to go for the Macbook, other than the fact that it's new! So what does your nose tell you?
BTW, I already got a Windows Ten laptop with JAWS.