24AA1025: operates from 1.7V - 5.5V, 400kHz, $2.37
24FC1025: operates from 2.5V - 5.5V, 1 MHz, $2.37
24LC1025: operates from 2.5V - 5.5V, 400kHz, $2.37
24AA1025 is unique, because of the lower operating range. What I don't understand is why Microchip produce both 24FC1025 and 24LC1025 at the same price with different maximum clock frequencies. Why not just make one? Am I missing something?