Not a bad article but some slightly dodgy claims in there.
So the R33 is the only four door GTR? If we ignore that that car was (AFAIK
) an Autech car the original Skyline GTR had four doors.
The Le Mans cars were not really GTRs. Like most Le Mans car in the GT category they were very heavily modified, ran RWD only etc. Nothing against them but a very different kettle of fish compared to the touring cars.