“Whoever was blind in this life will be blind in the Hereafter”
In this reading, the two words are identical, though the second may imply a greater level of blindness.
أَعۡمَىٰ فَهُوَ فِي الآخِرَةِ أَعۡمَىٰ
aʿmē...aʿmā
“...will be even more blind in the Hereafter”
In this reading, the first word is pronounced with imālah to differentiate the two occurrences. This indicates that the second occurrence is to be understood as 'blinder than he was'.
Explication
These readings convey the same general meaning, though it seems that Abū ʿAmr's makes explicit the comparative meaning which may be taken as implied in the majority reading. (NB: most grammarians consider it impossible to form an afʿal comparative from a noun which is already in form afʿal, as in this case.)
He has revealed to you ˹O Prophet˺ the Book in truth, confirming what came before it, as He revealed the Torah and the Gospel
Explication
These readings convey the same general meaning, though it seems that Abū ʿAmr's makes explicit the comparative meaning which may be taken as implied in the majority reading. (NB: most grammarians consider it impossible to form an afʿal comparative from a noun which is already in form afʿal, as in this case.)