Are the Kuhn Gf502THA & Gf5202 THA the same as Frontier TD 1316 and Frontier 3418? I was looking for a 4 rotor Kuhn tedder and found a Frontier tedder and it looks to me like it is a Kuhn painted green. I'm not familiar with any tedder. I have been told that the Kuhn's are top of the line.