Are there any differences between Shimano 10-speed connecting pins? I am looking for connecting pins for Shimano CN-5600 and CN-5701. I found some on eBay but are for Dura Ace. Are they compatible?

The chains in question are super narrow HG which are 5.88 mm wide.
Yes, despite other differences between chain models (directional vs not, IG vs HG, etc), there is only one model of Shimano replacement pin for each speed generation of Shimano chain.