Having used both Arcsaber F and 5u versions, I don't feel there's a difference between both rackets. Other than the weight, the specifications are similar. If there's any difference between the two, it's the strings. I have strung one on Zymax 67, and the other on MicroLegend. The difference in feeling is very pronounced. Z Force is too head heavy for me. I don't play well with it, but other players in my group like it very much... You got to try them out to find out which you prefer.