Comparing Bachmann vs Lionel is a contrast between two very old, established names in electric trains. Lionel, in one form or another, has been selling trains since 1900. Bachmann, the largest seller of trains in the world, was founded in 1833, though they started selling trains in 1966.
Ironically, it was Lionel that got Bachmann into the train business. In the 1940s and 1950s, when every kid wanted a Lionel or American Flyer train, Bachmann sold buildings under its Plasticville brand so kids and dads could build towns for those trains to run in. As the focus shifted to smaller scales in the 1960s, Bachmann moved with it, with greater success than the companies it once shared a symbiotic relationship with.