On one hand or the other

I understand the example below
一方A他方B
Means "on one hand A but on the other B". I've also seen
A一方B
which, i guess, means roughly the same thing.

Now, to my two questions.

1. Are those two (nearly) interchangable? How nearly?
2. Is A他方B also a possibility? How nearly?

--
Vänligen
Konrad
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Sleep - thing used by ineffective people
as a substitute for coffee

Ambition - a poor excuse for not having
enough sence to be lazy
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