I've now been to three Canadian weddings, and another wedding in Canada that wasn't traditionally Canadian. Although most elements are the same in both countries--bride and groom, various family members, clothing, food--some things are different. And N.B., I mean for this to be the last post about weddings.
For one thing, Canadians take lots of pictures in the church, even when the bride comes down the aisle. I remember my first wedding (ahem), and my sister's first wedding (ahem), when the photographer could take pictures during the ceremony, but only from the balcony and with no flash. It's been long enough (ahem) since either of those U.S. weddings that policies may be different in the U.S. But I was still surprised at the shutterbugs flashing on the wedding party all during the processional.
Then, too, there's this thing called "the signing of the register." It's the wedding paperwork. In Canada, it's a photo opportunity. The bride sits and signs, the groom ditto, and both witnesses, and then the minister. Meanwhile, cameras go like crazy. In the U.S., I'm sure there's paperwork but it happens behind the scenes.
A tradition in Thunder Bay is the shag before the ceremony. It's a little different from what Austin Powers had in mind (though that goes on, too). The shag, in Thunder Bay, is a combined bachelor/bachelorette party; the name is thought to be derived from "she" and "stag." The parties likely go on elsewhere, but the name seems to be unique to the Thunder Bay area.
Anyway, sometimes the couple charges $10 or $20 for admission, booze is served (sometimes from a cash bar), there's a DJ and music and dancing, and basically people attending have the opportunity to get money to the bride and groom through various ruses and games. Many of those same games are part of wedding receptions in the U.S.--the bride is "kidnapped" and the families have to "pay ransom," the men in attendance pay to dance with the bride during a special dance, etc.
Again, weddings in Canada are another arena in which the differences between cultures show up in the little things. Enough of the traditions are the same as weddings in the U.S. that the event feels familiar--except for the few traditions that are different. It's like a little skip in an LP record, or one of those blips in a DVD where the action freezes.
At the end of the day, though, the couples are married. Everyone has a shot at happiness. What happens next is up to the couple. That's the same anywhere.

