I first had the P239, then the P229, and then the P224. All in .40 S&W (except that I also have a .357 Sig barrel for the P224).
From shooting and carrying all of these, my take is that the P224 carries more easily than the P229 and about the same as the P239. Though it is obviously wider than the P239, it is also shorter with the standard magazines.
The P224 is not as easy to control as either of the other two. The P229 is a longer, taller gun with more weight and a full length grip. The P239 does allow for the pinky to fit on the grip (though not as well as a larger pistol), and this makes it easier to shoot despite being lighter (from my memory) than the P224. However, the P224 gains some ground when a longer magazine is installed (good lucky trying to find the factory mag with grip extension). But even a P229 magazine will allow for a pinky, and this does improve control. It's certainly not difficult to shoot with the standard magazines, just not as easy as the other two when my pinky is hanging out there.
Side note: The Mec Gar +2 extensions do fit the standard magazines, though the mag springs may (or may not) need replacing for reliable feeding. I have two of these on the way as they are readily available. There is also a pink extension modification on Pinterest using extensions for a S&W or Springfield XD (I can't remember which, but the pinky extension baseplate requires so modification). Sig seem to have stopped producing parts and accessories.
I assume the P224 was Sig's answer to the G26 and G27. Mine functions well, and is now carried often (purchased only a few months ago). But it is a blocky, thick, and relatively heavy gun compared to the competition. And the short grip does make it feel slightly less than secure. So I understand why it wasn't popular, and why it was therefore discountinued. There may possibly have been some early reliability concerns, but mine was made in October 2013, and has had one failure to eject with each included 10 round magazine, the first time each was used. And it had a couple hickups with Winchester Ranger Bonded 165gr. Otherwise, it has worked as intended. Not a single problem with. 357 Sig.