GRP vs VCP

I need someone that knows very well about Glass Fibre Reinforced Pipe (GRP for sewage systems), to do a comparison between GRP and Vitrified Clay Pipe (VCP), and prepare a statement of Why VCP is better than GRP? The statement must come with study data, research figure and it will be great if case study is attached. Please contact me if you're able to provide the service. Thank you.