I think it kind of depends on what your looking for...

Edges are the most stable of them all and the best first big plane available. But lacking some characteristics for good precision flight including "desired" stall tendencies. Usually lots of coupling too.

Caps are well known for precision aerobatics, 3D and are good all around models. But they do have a tendency to drop a wing tip or stall more so than others. Short coupled as in short fuse length, great tumbling maneuvers. Light is really right for these models.

Extras are very stable precision aerobatic models and work very good for 3D, but not as good as others.

Giles are a little smaller as for scale fidelity and or compared to other models of like scale percentages, therefore most come out a little heavy as they are typically equipped with the same equipment. Short coupled as the Cap. A properly set-up and light Giles is an exceptionally good model for all around stuff. VERY good for 3D and precession aerobatics.

Sukhoi's another beast in disguise if built right. Pretty good all around model, high alpha stuff doesn't seem to be one of its strong points.

I own 40% examples of all these models, less the Sukhoi. A very talented young friend has provided some exceptional flight demos with his 40% 3D modified Sukhoi. I also have 33% examples of the Edge, Cap and Sukhoi.

The secret with any of these models is wing loading, keep them light as possible for the best performance.