That's a big question.
Our standards are different in some ways, perhaps better, perhaps more restrictive.
Some American seats don't meet CMVSS without extensive modifications (some don't at all), while other manufacturers simply aren't willing to spend the money to bring seats to Canada because the financial return isn't enough.
More later. Sorry, 3yo had to pee.
So at the same time, our standards are more restrictive. You MUST use a tether anchor forward facing, no exceptions. Rearfacing limits are usually lower, even on the same model, so ERF is harder and more expensive. Kids are turned earlier due to lack of affordable options. Seats are more expensive, some by a lot. If you have a 65lb 2yo, you're screwed because our harnesses max out at 65lb. Does that make them safer? It really depends on your point of view.
I think you have to be careful about making decisions based on other countries rules. Sure you are going to be influenced somewhat (RF to 5 them booster like the swedes, perhaps), but I don't think limiting yourself to carseats only available in multiple countries is a particularly effective or efficient way to increase your child's safety. Does that make sense? My brain is not quite functioning on all cylinders tonight.
Sent from my iPod touch using Car-Seat.Org