Green Mountain bows were made by Jim Duclos in Vermont.He quit making bows many years ago,an excellent bow in my opinion.They are a mild R/D bow,his bows have one of the best workmanship and leather work I've seen.I have one I ordered and still have it,it is an excellent shooter also.Thunderstick bows are made by Jim Reynolds in Michigan,an excellent bowyer.They are both quality bows,it comes down to personal preference.I had a Thunderstick III,great shooting bow.For me I would pick a Green Mountain longbow,but thats my preference.I like the excellent workmanship,strings up to a D-shape,grip,leather work and shape of nocks.And I've shot some of my highest 3D scores with my Green Mountain.