Try the O.S. 2060. I have heard that is supposed to be the smoother of the two. I personally don't have either. I didn't feel like putting out that kind of coin right after I already had for the motor so I bought the EB mods EFRA 2041. I havent gotten a chance to break in the new speed yet though. I have been running a JP-3 on my standard v-spec in my losi truggy and it has been good to me so far. But I think the smoothest would be the 2060, or atleast thats what I have heard.