My understanding is that the railcar sets which are to be used on the Pearson link are comparable to the Budd self propelled railcars, only with much more modern, much less polluting diesel engines and exhaust emission controls.
Also I still maintain that those folks in 383 Sorauren on the south side will have a gorgeous view from their windows into the windows of RWL not 15 feet away. Makes no sense to me.