I would assume that the Parker is better? But I wouldn't pay $170 each for them.
One advantage is that you don't need a DC power supply.
But I'd also say that you don't need the features of a G215 for a router, when the G201X does the same thing for quite a bit less. My preference is Leadshine AM882's from Ebay for $70-$80 each.
For a small router, a lot of people just use a Gecko G540, or Leadshine MX4660.