Reply to APC 40 vs VCM 600 Controller choice help!

Thinking of an upgrade but considering which would offer more value in terms of ease-of-use and quality. Since both have been out for a while already I believe now would be a good time to compare/contrast the two. VCM600 looks pretty huge but I like that it's bus powered.

Tell me which one you prefer and give reasons why you chose that controller and help me make a better choice! Thanks.