Electrical Conductivity. Carbon steel typically has better electrical conductivity than stainless steel because stainless contains chromium, which increases electrical resistivity.
Resistivity. Carbon steel generally has lower electrical resistivity than stainless steel for the reasons above.
Cost. Carbon steel is generally less expensive than stainless due to the absence of alloying elements like chromium and nickel.
Tensile Strength. Stainless steel can be stronger depending on grade (e.g. 304 or 316 might have higher tensile strengths via work hardening or treatment), although some high-carbon or alloyed carbon steels can match or exceed it.
Durability. Carbon steel is less durable in corrosive environments due to rust. Stainless steel forms a passive chromium-oxide layer that protects from rust, making it more durable where corrosion is a concern. In non-corrosive environments, carbon steel can be very durable.