Difference between Share EXII and Perfect Dark

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[yamatora]

It now appears that Share has been succeeded by Perfect Dark (P2P)

Hi there

I was wondering what the difference between share, share EX II and Perfect Dark actually is. The Wikipédia article points out that Perfect Dark is the successor of share; which one?  share or Share EX II or both (Share EX II itself being a new version / evolution of share). Or are share EX II and Perfect Dark both p2p clients working on the same principles/network ?
In the latter case is one to be recommended?

With regards, YT

[silverado]

Perfect Dark uses a completely different network and is more secure than Share EX2.

[pinge8]

So which is better Winny, Share or Perfect dark?

[francis1240]

PD requirement is higher,  higher UL speed and you need to keep 50gb of garbage (files that you cannot use but just serve as cache) &
PD's program is more sluggish, less stable

no statistics but I guess more users are staying with S2

But most important, it's not any of the above, it is