I completely disagree. A chisel grind, hollow, convex, full flat, saber, scandi would ALL cut differently for different tasks. A hollow grind isn't even in the same ball park as a convex when chopping and the convex wouldn't be able to compete with a hollow grind when shaving.
A hollow grind might break or chip when chopping, but that doesn't mean the heat treat was bad, only that the geometry is not suited for it. It's not my test, but I would certainly suggest that everything is identical. You aren't testing which grind and tip shape works best, but which heat treat is best. For that, all things have to be identical. For that matter, you might want to grind two blades the same and send one to Darren to heat treat. That way you will know that both blades are equal except for the HT.