Rye/Wheat vs. Rye/White Bread Bake-off

After learning how much more phytase (which of course neutralizes the mineral-binding phytate) rye flour has than wheat, and reading how the healthy remote Swiss studied by Weston Price lived on mainly rye bread and dairy products, I've been trying to use more rye flour in my bread making. Unfortunately, using 100% rye flour makes for a very dense loaf (especially with my sourdough recipe), so I've been mixing rye flour and white all-purpose flour in my bread lately, thinking whole wheat would still be too heavy. On a whim, I decided to try a side-by-side comparison of a half whole wheat/half rye loaf of pumpkin sourdough bread, and another using the same recipe, but with half white flour and half rye. Here were the results:

The loaf on the left is the one with white flour, and as you can see it did rise a little bit more (which caused it to crack around the bottom). I had flattened it a bit more when I put it on the pan, so it's a bit wider, but pretty much as tall, as the whole wheat loaf on the right. All in all, though, the difference is too small to convince me the loss of nutrition is worth it, so I think I'll be using the whole wheat rather than the white flour.