Lexmark makes standard and high capacity inkjet cartridges for some printers.
The Lexmark 10N0017 ( # 17) is the standard capacity version BLACK of Lexmark 10N0016, which is high capacity version, while the Lexmark #10N0027 (#27) is the standard capacity version for COLORS and Lexmark 10N0026 is the high capacity version. All printers that uses Lexmark # 17/27 accepts also Lexmark # 16/26. High capacity is always more value for money, so for a small price difference, the ink and page yield is substantially more.
Same is true with Lexmark 18C0032 (# 32) which is the standard version for BLACK of Lexmark 18C0034 (#34), which is the high capacity, while the Lexmark 18C0033 (#33) which is the standard version for COLORS of Lexmark 18C0035 (#35), is th high capacity version.