He didn't mention anything about how the two cars were spec'd. Options like magnetic suspension, sports exhaust, dynamic steering could all easily account for the perceived differences he talked about. The way the video is presented makes sounds like the spyder is softer/quieter, just because it is a spyder.
I fully agree with you. Also he did not mention that the Spyder weights more than the 610 Coupé due to the ragtop construction. With the absent of AWD the 580 weight even less what ends in a close performance of the two.
I think that reviewer needs some new glasses.
(In the drag race portion of his video)... He stated that the two cars are "pretty much inseparable".
Really ?? It sure looks like the LP610-4 is well over a car length ahead of the LP580.