The Freestones are nice, the Lightwieght are better. But ether way they are simms and fantastic waders.
The Freestones are made of a cheeper breathable fabric than the GoreTex Lightwieght waders. This fabric is more vonerable to pucture and ripping.
The Lightwieght are reenforced in the knees, the Freestones are not.
Both have good suspenders, securely attached neoprene feet and a lifetime warenty on all seems.
Both have Simms service and support which includes one free repair on a seam when sent to there Headquarters in Montana.
The Freestone's were voted the best wader for the value by Fly Fish America in 2002.
Hope this helps. Both are great waders. I would recommend ether one. I personally prefer the Lightwieght, what a great pair of waders. I think you will be satisfied ether way...
-Chad