Hello and welcome to the Digi Forums jocelyn.sirois!
It really depends on the model of the Digi WR. Some models have different Category of radios that provide a higher throughput than others for example the WR21-M5 is a Category 4 radio whereas the WR31-M8 is a Category 8 radio.
Then the number of tunnels matter after that. For more information, I would contact our Sales department at email@example.com for more information.
Digi Technical Support Engineer