Can anyone explain to me why boards like Nano and Pro Mini have 8 analogue inputs on headers, while Uno has 6, even though they use exactly same microcontroller?

6 or 8 analogue inputs?

Topic		Replies	Views
Arduino vs Arduino Mini - 6 vs 8 ADCs? Development	2	1082	May 6, 2021
Are the analog inputs on the Mini also digital ports? Programming	3	428	May 5, 2021
Question! Arduino Uno and Pro mini IDE 1.x	2	868	May 5, 2021
board lots of analog inputs? Suggestions for the Arduino Project	3	5722	May 6, 2021
atmega328 6 o 8 ingressi analogici? Generale	7	766	May 7, 2021