You know I have heard this for some time now, that DE and SE blades are sharper than straights...
I have also told people numerous time to use either one, to get a feel for how the edge tests (TNT, TPT, HHT) should look and feel when learning to hone....

I have always taken this to be a true statement, until I actually bought a DE and actually used it ONCE to shave with before selling it.... (not for me)
At that time I took one of the DE blades and did what I had told people to do many times, and tried the blade tests myself... Needless to say I was not all that impressed with what I found, it passed all the tests and I still think it is a good way to learn how the tests should feel, but I would put any of my edges against those Personna edges any day of the week...
I have never even held a Feather so I could not say on that one...
That's my new 2 cents...
So from now on I will not automatically assume that machine made edges are better than hand honed straight edges, I wanna see it, and have it proved to me....