It won't be range limited because both Canada and the US are FCC so range would be the same. The drone changes from CE to FCC based on homeport location and not where you purchase it from.
I have seen some posts about this happening, but the concern was just around warranty as you would need to take it back to Canada for the warranty to be valid with an address somewhere there.
The RC Pro 2 is 'supposed to have longer range' and that may be due to its antenna configuration. Both put out the same transmitter power 2 watts at 2.4 GHz and 5.8GHz however the RX Pro 2 has another channel at 5.1 GHz where only puts out 200mW...