This topic came up a while back. I think the consensus was the "A" legs offered better stability. Most of the pictures I've seen here and on the Dutch form of HW rigs that incorporate the Ikea Galant use the "A" legs.
I have this infamous table (with chrome "A" legs) and love it. If I ever decide to upgrade to a true VPO table or real organ console, this table will be put to use for other purposes in our home. I purchased it used from an office that was downsizing for pennies on the dollar! It was in excellent shape seldom used as a conference room table.
Not to go off topic, if you're patient and know how to look for deals, you can have build a nice HW setup up under budget leaving extra cash to purchase another sample set.
Danny B.