I had a Bamboo Viper and I thought it was a sweet shooter,fast and smooth.I still have two Savannah's and they are good shooter's also but I believe the Viper was faster.I didn't chrono them.I think the Savannah's are prettier with the zebrawood limbs and the bubinga riser's.My heavier Savannah has great looking limbs and has a better looking riser,nice looking grain.Sometimes bubinga looks kinda of plain,but bubinga makes a solid riser wood.For me I like the grip on the Savannah slightly better.The Bamboo Viper was a solid bow,well built and the carbon and bamboo made a great combo for speed and smoothness.