To cliam that any TVR dosnt hanlde implies a complete lack of knowledge about the company and the British low production car industry in general.
Every TVR ever made has been known for having great handling, and the Speed 6 is no excpetion. When mixed with on of the most powerful inline 6 cylinder engines ever made, and the cars extremly light weight it would leave the Viper writhering in the dust.
The Speed 6 is a road legal race car, and its only barly road legal, just enough so you can drive it to the track and save on needing a trailer.
The Viper is a road car, and very big heavy one.