Waterproof trousers require cycling very slowly to avoid a sweatfest - probably a good idea anyway in those kinds of conditions.
Overshoes need something over them (at the top) to stop water entering at your ankle. I still think neoprene ones work best for warmth, and keep the rain out for a bit, unless they have shitty seams (which can be alleviated to some extent with a bit of silicone grease).
Water seems to get through all of them in the end though.
Waterproof trousers require cycling very slowly to avoid a sweatfest - probably a good idea anyway in those kinds of conditions.
Overshoes need something over them (at the top) to stop water entering at your ankle. I still think neoprene ones work best for warmth, and keep the rain out for a bit, unless they have shitty seams (which can be alleviated to some extent with a bit of silicone grease).
Water seems to get through all of them in the end though.