I’ve never been enamored with the ends of the Kato-designed Con-Cor models, even back in the day. The fact that InterMountain makes multiple variations of roofs and ends makes it easier for me to combine the right puzzle pieces rather than carving off detail and adding roof stampings. It’s easier to body-mount and adjust ride height on an InterMountain core as well.
The Con-Cor models were the best-looking boxcar models prior to the appearance of the Kadee products, although the painting and printing wasn’t the best. But that was half a century ago.