well, your cerainly right about the 16th C and 18th C corsets. not much difference there on a teenyweeny girl like me.

i do have hopes up for the 19th c. and i've always dreamt about getting such nice hour glassy form... think the most important for me is to get a good and firm bust support even though i'm small. that's why i picked the 1873, it's very flat in the front (which i think makes it tight enough) and then curves out to the sides. don't have enough bust to curve out much both in the front and out towards the sides...
the second one was mainly interesting because it seamed to give a nice bust lift.

well, at least i have somewhat broad hips to compesate for a tiny bust part ;)