Wrong--- big difference.
The Amish are the ones that ride around in horse drawn buggies, and farm Wagons. and still use kerosene laterns for lighting.
Mennonites drive old black cars, wear old fashioned black suits and dress, But they have electric Lights, radios and television sets in their homes.
This is true. The Amish, especially the Old Order Amish tend to keep much more to themselves and to be seperated from the mainstream of American society than the Mennonites. The Mennonite farmers use modern farm machinery (tractors, harvestors, etc) and modern farming methods. The Amish use horse drawn equipment and live much as they have for the past 200 years. The Amish live much more the idea of "Be in the world but not of it."
Actually, you're both wrong on this. Though not totally. There is a wide spectrum of ideologies relating to technology use within the Amish and Mennonite communities. There are better than a dozen large divisions within the Mennonite/Amish denomination, each with different rules which vary within both regional and local groups. Both include an Old Order. There are groups that are more conservative than Old Order. The Amish are themselves a splinter group from the Mennonites.
To abstract, rules for cars vary from buggies and wagons only to can ride in cars, can own black cars, or can own any cars. Those that allow cars tend to prefer pickup trucks. Rules for farm equipment vary from horses only to gas engines for stationary equipment, gas engines to power field equipment(though still horse-drawn), steel-wheeled tractors, or rubber tired tractors.
As for black clothes, groups that require that also allow somber shades of green and purple.
Speaking of the groups that i know best, the Mennonites near Harrisonburg, VA ride in horse and buggy. The Amish near Dover, DE ride in buggies, use horse-driven machinery in the fields, and don't allow electricity. They do use steel-wheeled tractors to power stationary equipment. Neither allow their members to drive cars, but do allow them to ride in cars. The only visible difference between the two is the style of their buggies and their church buildings (these Mennonites have large, though simple, churches, but i've never seen an Amish church, and i've driven around Dover a lot). However, the Mennonite churches near Greenwood, DE have no technological separation.