According to Aequitas' research, and based on market capitalization, consolidated real-time TMX fees for retail investors are around 100 times more expensive than consolidated US fees.
100 times!
Take a look:
http://www.equedia.com/wp-content/uploads/2015/12/consolidated-data-costs-1024x625.png?utm_source=December+20%2C+2015&utm_campaign=December+20%2C+2015&utm_medium=email
Aequitas Innovations 2015