As stated above it's all about personal preference. Also a stated your linked 1911 is a double stack. The grip is wider than a "normal" 1911. I suggest finding both in your local area and asking to fire/handle them and see which one you like the best.
My personal preference is to stay away from M9s. But that's just my experience with them in their real steel versions. The M9 has a BEEFY grip and IMO the safety isn't in the best of places. It's pretty high up on the slide, and the grip size is just huge IMO for a pistol that only holds 15 rounds in the real version.
Out of the two I would prefer the 1911 because IMO it feels much better in the hand and handles better. Weights are comparable.
In real guns I'm a GLOCK shooter so my GBB Pistol is a KWA ATP. It fits my GLOCK holsters and is similar enough for me.
Here's a link to a single stack 1911. IMO you can't go wrong with this one.http://www.airsoftgi.com/product_info.p ... ts_id=6784
or (I have this one) the WE MEU 1911. http://www.airsoftgi.com/product_info.p ... ts_id=4393