JROCK, what kind of info about VE are you looking for? In the final analysis it's a comparison of total project cost. Fuzzy parameters like time to install or public inconvenience during construction might apply. Life cycle cost, maintenance or aethestics might not apply depending on the project. Perhaps a difference between sheet pile and secant pile might be that your sheet pile wall would only be temporary shoring and a reinforced concrete structural lining would have to be built inside whereas you could design a secant pile wall to be both shoring and final structural lining. That would depend on what you're building.