This really depends on what you're shopping for. Black Friday tends to have great deals for big-ticket items, like televisions, Apple products, and other tech. These deals can be very limited in stock because they're meant to be eye-catching and huge. However, Boxing Day sales tend to focus more on clearing out old stock before the end of the year, so they can be a lot more varied. You can still find really good deals without having to fight anyone for a television.