Almost the same po eh, in my case I checked with St. Raphael Travel and Tours, they have me at $820 all in going to Edmonton, but they determine the date; through Expedia I can get $937 but I get to choose my own date. If I wanted to get creative, I can also get a straight flight to Vancouver (PAL) for $800, and avail a Westjet promo ticket for $80 going to Edmonton.
I guess it all boils down to your mode of payment (travel agencies accept cash only; online payments accept credit card) and convenience of booking.