Are you being facetious? I would have to disagree. The Ergo setup is much different from the Sora setup. Yes, they both use thumbshifters but the similarity ends there.

1. The Ergo thumbshifters are set further back allowing you to reach them from the drops. I do not know of anyone who has fingers long enough to reach the Sora thumbshifters from the drops.
2. The Ergo shift lever is placed in the same position as the Shimano STI secondary levers on the Tiagra and above shifters and the brake lever is independent and does not swing from side to side as with Shimano.
3. The shift levers also can move back and forth independent of the brake levers to accomodate reach. Actually the whole system's position is designed with a shorter reach than Shimano.
4. The Ergo's left shifter has many more trim positions than Shimano STI. And Sora I believe has no trim positions at all.
5. Also with Ergo, you can trim the front derailleur in both directions while with Shimano, you can only reliably trim in the downwards direction.
6. You can perform multiple shifts in either directions with Ergo. With Sora you can downshift up to three at a time but only single-step when upshifting. Also, while Shimano in general seems to shift smoother when new, Campy seems to shift more reliably over the long haul and double-shifting on Campy drivetrains seem to be less finicky.