Why are the connecting rods of the multi-link independent suspension on the rear wheels of some cars very thin, while some are relatively generous lower arms? Which is better?

Be comfortable when you do it carefully, and be gentle when you turn, such as sweeping your hair. Hanging in motion, just like a photographer's shooting, transforms a simple action into a synthetic action composed of many slow movements, which is more layered and goes all out to make corners and turns interesting. The interference caused by abnormal sound caused by rigid connection of parts is greatly reduced.