As a liqud transport system:
Endertanks:
+ Relatively cheap (in comparison to the diamonds, and such of Tesseracts)
+ Relatively simple to make (no multi-stage crafting)
+ (Debatably) Single sided. No issues with crossing over
- Require some form of force to move liquids out
- Frequency system is a little complicated/requires extra items
Tessracts:
+ Simple to set up
+ Public/Private frequencies work much better
+ Motion is kind of carried over form the input side
- Complicated to make (need at least induction smelter, magma crucible and liquid transposer)
- Costly (4 ender pearls + diamond, silver, etc.)
To be honest, the endertanks are earlier-game for me. Tessearacts are much better for set-and-forget systems. If they bring out a portable version (sort of like an everfull bucket, similar in principle to the ender pouches), then there will be much more point to running both systems in parallel.[DOUBLEPOST=1363782652][/DOUBLEPOST]
Yeah, the difference is that you need to pump out of the Ender Tank, but the tesserack doesn't store anything, it just transmits, so you just need to connect the correct pipes.
Ender tanks are great for when you need actual storage to be split, but those are usually very specific cases, so specific that I don't see one right now.
Actually, you can mix and match pipes with tesseracts (definitely waterproof pipes/liquiducts, not sure about RP liquid pipes).
Mainly because the way that they work is that they have essentially a tiny, auto-ejecting inventory that's shared between the devices.