I'm pretty sure I haven't ever seend the 7A in person, but it looks awkward. The tanto just fits the knife very well. I own a tanto version and it's my only tanto knife. I like the 7 tanto because it looks perfect. The 7A seems like a compromise to me. Also, with the super thick stock, the tanto is GREAT as a utility blade. One day for a friend I stabbed through a piece of aluminum duct multiple times as to give him a hole to start his cut with snips up at the cabin. I didn't leave a mark on the blade and worked like a charm. ...It is a lot more intimidating looking knife in the tanto version though. WAY more intimidating. The chisel grind has also grown on my a ton. I much prefer the look of the chisel grind on that particular knife. I love everything about the Emerson 7 now. It's my only Emerson.
As a side note, my Emerson has went from a sticky lock and not so smooth, to the smoothest knife I own, with a crisp lock up, and a detent click sound and feel that is almost from heaven. I know that sounds ridiculous, but the detent is the first thing people mention when the use the knife. Like I said, I am not a huge Emerson fan because big scary knives aren't really my thing, but my CQC7 has the best feeling opening and closing out of all my other knives (spyderco, benchmade, etc).