"Texas Trails and Active Transportation Conference"

Ok...Just to throw this out-there. [monday night semantics at its best]
What's the difference between Conference & Symposium?
hmmm...
~TEXAS Trails & Active Transportation Symposium~
Is it fluff?? Is it less pragmatic?? Does the word -symposium- help take-away some of the TxDOT-ish-ness out of the word transportation??

Here is the LINK to the Wikipedia definition and Here is the LINK to the Wiktionary definition

What do you think~?~