Both will not hit btc.Comparing ethereum is also acceptable to some extent.but i don't know how you believe bcash to hit bitcoin.Bcash is nothing but a trash coin created by roger ver and supported by jihan wu.It has been created for their benefits and its being continuously pumped.Many quote that bcash provides quick transactions with very low fee and so it would would surpass bitcoin.But,when lightning network gets activated in bitcoin,then bitcoin would become once again uncomparable.