The all are family... So feel" would not be that different.
The A-1 has an unpleasantly located metering memory button as we recently discussed in another thread.
Just because they are similar in feel I rather would put them all on a table first and look for differences: focusing aids, controls, exposure automation etc.
Then decide what would be of most importance to you, and take that for a walk.
(I myself am bad on decicisionmaking...)