Remember that your DE blades are machine-made and can be made to exacting tolerances. I have a Shavette and a Feather SS, and in both cases the blades are clearly, although just incrementally, sharper than my straights. I've had straights honed by the best, although I now hone my own, and while the replaceable blade straights are sharper, the real straights are just a tad off that level and still produce fine shaves. I think your DE blades can function as a baseline for sharpness, but as a 'standard' of sharpness that may be too high.