I mean, this would be meaningful if the Brummbar had an equivalent to the WP shell, but it doesnt, so I'm not sure why this is a "goose/gander" situation, really. When was the 105's WP shell changed, anyway? I can't say I recall.
i guess he's talking about the dozer upgrade to the 75mm sherman in mechanized/urban assault. which, of course, doesn't make the argument and especially the conspiracist conclusion any more valid, since one is a beefed-up medium with great AI and adequate AT while the other is a purely AI casemate assault gun with some emergency AT capability.