I just looked up the specs for the Aegis: OAL 8.25", blade 3.5", weight 3.1 oz
now, just for giggles, compare the 0560: OAL 8.8", blade 3.75", weight 5.8 oz
The closed length will be less than 0.5 inches different, but the 0560 is a more substantial knife. It is a little larger in every aspect, and weighs nearly twice as much (though I don't consider it overly large or heavy - it is about 2 oz lighter than what I usually carry).
Be aware that, unlike the Sog Aegis, the 0560 is not assisted; nor does it open like an assisted knife. That doesn't mean that it is difficult to open; but if that action is important to you, there are better options. On the other hand, there is a benefit to being able to control the opening of your knife at times.
The Aegis uses AUS8, the 0560 is Elmax. Not really much comparison there - the AUS8, from what I remember is easily sharpened...but just as easily dulled and damaged. Elmax will take a little extra work when it is truly dull; but periodic (and quick) touch ups will help avoid that...and it's edge retention is better than that of AUS8.
I think the 0560 is a marked step up; but whether it is the right choice for you is still, ultimately, your call.
Good luck