No. Lettuce is thinner and sometimes crunchier than cabbage. Lettuce is quite tasteless but is normally eaten raw in a salad which it goes well in. Cabbage is very strong and overpowering if eaten...
In order to get seeds from a cabbage plant, you must let the cabbage flower and then allow the flowers to stay on the plant and get fertilized and then the seed pods will develop. The only problem is...