The VSA is bigger but the Forest is better. It depends on the sound your looking for. I'd burn the VSA for a pair of Forests but not visa versa.
I have Mani-2's (the original one) with a Rel Storm III in one dedicated room, and VSA VR4genIII's in another. The VR4genIII is a step up from the VR4jr (Albert Von Schweikert's assertion, not mine), though the jr is a slightly newer platform.
If you look at my virtual system you can see the setups. One thing to note, I have swapped the speakers between rooms (one is a dual purpose Music/home theater room), so my judgments about them aren't colored by room influence.
I wouldn't say either is better. They are different, and I'm completely satisfied having both and alternating between them.