Well it depends what you want to do, which you still haven't said...........
If, for example, you were transferring large files between a wireless laptop and a wired server on the same network, especially one connected to the wireless access point by a gigabit LAN then you might see faster throughput.
But it would depend which "N" version (there are many options) was actually active and how much external interference and other useage.
However the DGN2000 has only 2.4GHz "N", ADSL2+ (max 24mbps) and 100mbps LAN, so you can probably work it out yourself.