If you are only using it in winter, then the waterproof one. It is an excellent bit of kit but I've decided its to heavy and will probably sell it as they are just sitting in the wardrobe.
The mesh over jacket/trousers are obviously cooler but have no waterproof capability, strangely. Unless someone invents a waterproof hole I guess
Supposed to offer excellent protection. I find it to be very heavy, wearing the trousers and the jacket. Great if you don't do much walking in it off the bike.