My examples might look straight, Maneera, but apart from those white jeans, they are not, I assure you. Some of Angie's examples might illustrate a bit better than mine; I'm not sure.
Anyway, the blue ones I show are in fact quite tapered so they are narrower on the calf, and this drastically affects the way they look, feel, and hang on the body. It's not just the tapering. The slouchier rise/ waist area also makes them drape differently than many straight jeans which can often be cut quite straight and snug in the crotch/ rise area as well (at least in my experience). There is more looseness in the hips and thighs and often the bum in a true BF. In fact, in my opinion, the only people who can really get true straight legs to look like BF jeans are tall really thin rectangles or ITs, who size up by a bunch of sizes and wear them belted and droopy.
In my opinion, the tapered BF cut was invented precisely so that other body types could partake of the slightly insouciant, devil may care, and "cool" look that reed thin rectangles and ITs could get by wearing guys' jeans. It's just not possible for a curvy woman to get that look or that "body feel" in straight leg jeans, no matter how high she sizes up. When I wear my slouchy skinnies or my BF jeans I always feel a bit like swaggering. When I wear straight legs, I sometimes feel a bit constrained.
Your jeans don't look like BF jeans to me, no -- they look like slim straights. (They look nice on you, BTW, just not like BF jeans).