I pick Edmonton, not only because I am an Oilers fan, but because Vancouver has not been able to dominate Edmonton in any game. Edmonton, however, was able to dominate Vancouver in last night's game and expose some weakeness/shortcomings and capitalize on mistakes.
That said, I think more pressure will be on Edmonton as the favourites going into the series, despite the Canucks regular season record.
On the flip side, the "advantage" part of home ice advantage cannot be discounted. Playing in a familiar rink in front of perhaps one of the best playoff crowds this playoffs (I'd say Dallas and Vancouver have the best and most engaged crowds in-arena this playoffs) - teams can and do derive energy from their crowds. Also, on a silly level, the alternating wins in this series would naturally have a Canucks win, to keep the pattern going. Hardly scientific though.
Regardless of the outcome, there is nothing sweeter than a game 7 between two Canadian teams in the playoffs