Concluding my thoughts on the remaining versions of Fidelio in my collection....
Lighter textures offer great clarity of lines, if lacking a little weight; a very minor quibble as this is a fine performance throughout. Both male and female voices are very strong and work very well individually and together. Harnoncourt directs a very refined, taut performance that flows fluidly.
The voice of Rachel Harnisch, although wonderful, is a bit too big for Marzelline for me. Nina Stemme is undoubtedly a show stopper. All of the voices are strong and powerful which leads to a powerful performance overall. It is still, however, not in my top rank; perhaps it suffers [for me] from having too many big voices competing with each other.
This is a wonderful version in every way. All of the voices sound like smooth, golden honey to me. The pacing is excellent, providing a good sense of drama and providing a sense of constant forward momentum. Fricsay conducts a taut, controlled performance but one that flows effortlessly.