Difference between Managed, CNG and CryptoServiceProvider hash algorithms

Hi,

So I was wondering if there are any major differences between the various implementations of the hash algorithms, take the SHA series of algorithms for example. All of them have 3 implementations each, 1 in managed code and 2 wrappers around different native crypto APIs, but are there any major differences between using any of them? I can imagine that the wrapper versions could have higher performance since its being executed in native code, but surley hey all need to perform the exact same calculations and thus provide the same output ie hey are interchangable. Is this correct?

For instance SHA512CNG cant be used on XP SP2 (docs are wrong) but SHA512MANAGED can.
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