are you on this page ?? Prepackaged data sets | Natural Resources Canada
do note the codes have changed between the new and the old
and then there is required read ... http://ftp.geogratis.gc.ca/pub/nrcan_rncan/vector/canvec/doc/CanVec_en_Specifications.pdf
and the root page
should be the same data, unless there is difference between the prepackaged and the interactive (prepackaged link is just to the right of the search button which takes you to my links)
Don't do much stuff with styles, so that would make you the expert... but I am sure you are aware of this
Managing style contents—Help | ArcGIS for Desktop and if the CanVec data did a huge change, then one would presume that either the translation would be painless, or they forgot to include something with their data. It might be worth linking to them as well.