The Russco is a nice unit as well, but has a different finished look, and is best suited to mounting in the vehicle interior. It is transformer based, so changing the output voltage above 120VDC requires a boost transformer kit.
The Russco is not really a transformer charger. Its an inductor charger with variable saturation as near as I can tell. It is not
isolated so the GFI protection is important and the vehicle frame should be grounded when charging as well.
Are the Quickcharge battery chargers isolated? Is a graph of the charge profile available? I was unable to find pictures and dimensions for the charger (fitting is an important part of the equation too.)