How is Helmholtz Watson different from other Alphas?

In this book, we are told that Bernard Marx is a little
less than what you would expect Alphas to be.  He's too short and too dark.  His friend
Helmholtz Watson is just exactly the opposite.  He is just a bit too good -- he stands
out because he's better than the rest.

He's tall and good
looking just like he is supposed to be, but he is also too smart.  That is what really
gets him in trouble.  He's too smart so he thinks too much. As we are told in Chapter 4,
towards the end

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"Able," was the verdict of his superiors.
"Perhaps, (and they would shake their heads, would significantly lower their voices) "a
little too
able."

That ends
up getting him sent to Iceland.