We can live without both of these. If one must choose, SCTP is better than DCCP in all practical situations, that I can think of. Ref: 1. https://en.wikipedia.org/wiki/Datagram_Congestion_Control_Pr... 2. https://en.wikipedia.org/wiki/Stream_Control_Transmission_Pr...

And honestly, "DCCP vs SCTP" is more like "ed vs vim". They are both meant to address the needs of very different use cases.

Googling around for a comparison, and came across this paper. Looks interesting so far.

http://www.bth.se/com/mscee.nsf/attachments/mukb08_Thesis_Re...