I will be up front here as I have a vested interest as I import the Legacy into the UK!
It is not a good idea to compare the Legacy with the "Rat" because their capabilities are very different and in my time I have owned a Rat but no longer do.
The Rat is good for dovetails and milling joints, the Legacy can cut dovetails but would not be my first choice of tool for that operation, either an Incra, Keller or Leigh would be more appropriate.
To help you better appreciate its features and benefits I have taken the liberty of enclosing the following paragraph as it is the best description, I have seen, describing what a Legacy Ornamental Mill is capable of achieving.
“ Imagine a machine that allows you to shape a piece of wood, turning it to the round for example, and then add other details that would normally require a shop full of machines, power tools and hand tools to achieve such as beads and coves, flutes or reeds, spirals or precision joinery. Now take that same machine and plane a 10" wide board flat and then add shapes i.e. mouldings or patterns i.e. dentil moulding or parallel flutes and then machine mortise or tenons or finger joints or any number of other details. Now take that same machine and turn round table tops or arches. Basically any form of woodworking can be accomplished on a Legacy Ornamental Mill. There are a few exceptions of course, but very few. This is the woodworking system that allows the freedom and versatility to add features such as: reeds & flutes, tapers, spirals, turned beads & coves, mortises, rosettes, contoured profiles, and so much more, all in one workstation.”
In passing the cost of a Legacy 900 is £1,150.00 and a typical system costs £1,400.00 which includes cutters but excludes the ½" Router which is about 3½ times the cost of a big "Rat", another reason for not comparing them because they are not in the same price range.
If any one wants more information then feel free to email me and I will, with the agreement of the moderators of this web site, send you a DVD and the Legacy News.