One thing worth noting is that the Powermatic, despite being more expensive, is a much less powerful drill. It has a 1HP motor, half the power of the one in the Voyager (when hooked to 230V; it’s 1.75HP on 115V). It also has a considerably narrower speed range, 150-3600 RPM vs 50-5500 RPM.
For typical woodworking applications, this probably won’t matter unless you’re using giant Forstner bits, but it’s a pretty significant difference if you intend to drill metal.