what similarities exist between the glass menagerie and portrait of a girl in glass

Laura is a fragile young lady who in contrast can be seen just like her glass figures. Nice to look at but very breakable. Laura's spirit is broken, due to her shyness, which is her real handicap. The two, written by tenessee williams, stories are very simaliar right down to the characters names. The portrait of a girl in glass was written before glass meneragie. The glass meneragie was based on this. Both stories take place in St Louis, both girls live in their own fanasty world.