I have used both the Channel Master 4228 and Winegard HD9095P The Winegard HD9095P has more gain, but does not handle multi-path as well as the Channel Master 4228.
In "perfect" conditions, you'll get more stations with the Winegard. In unfavorable conditions, the Channel Master will provide more stable reception. For a pre-amp, the Channel Master 7777 (VHF & UHF), or the 7775 (UHF only) has the best price/performance ratio.