though cs source is havin better gfx....cs 1.6 is more prefered ...!! u can very easily find hundreds of server for 1.6 is comparision 2-3 only of source ...!!source got better graphics but 1.6 is faster game.....very adjustable is terms finding as many mods is net as you want,as many maps...which keep on increasing ....less bugs,though not real but a better feeling of killing a player....like for headshot and that is wht the reason it is more prefered in gaming events too !!i have both games still i too prefer cs 1.6 !!