24" 16:9 = 23.6" screens (1920 x 1080)
24" 16:10 = 24.1" screens (1920 x 1200)
There is 120 rows of pixels difference.
16:10 versions are same pixel pitch as 16:9. They removed 60 rows pixels from top and 60 rows pixels from bottom, turn into 16:9 and charge you same price!