Comparison between cast iron and forged pans
Cast iron and carbon steel (aka “forged iron”) are fairly similar. Both require seasoning for best results, and can produce a decent non-stick effect when properly seasoned; both have high heat capacity but mediocre heat conduction; both are quite durable. Carbon steel is somewhat more lightweight than cast iron, making it more versatile (you wouldn’t want to flip the contents of a large cast iron skillet one-handed). Additionally, modern cast iron pans are rough-textured, which can make them  more difficult to effectively scrape with a spatula.
I own and use both. These days I use carbon steel much more than cast iron.