I have owned and shot both. I think very highly of both bowyers, Chuck and Dave.
The Dwyer original is awesome, a slender 1-1/8" in width and smooth as a bow can draw. Hand shock is pretty much non existent in both bows.
The Longwalker is just as smooth to full draw.
Both have a perfect attention to detail, fit and finish.
My experience is the Longwalker is a fair bit faster.
I owned both bows at the same time, the Dwyer was 53# and the Longwalker was 54# and I shot the same arrows out of each.
I would be proud of either, but my personal nod goes to the Two Tracks for being quicker.
Both are as quiet as a deflex/reflex bow gets.
I hope this helps you in your decision. Shooting them both yourself would be the best though.