Just curious if it’s just me, but when it comes to the elongated vowels there seems to be a case I find easy to mix up. For instance とお & とう sound/read to the same to me. However, when it comes to writing or providing answers to wani kani they are not the same. Is it just me or is there a phonetic difference between them I am not noticing. It’s not like the other lengthened vowels like where it’s pretty obvious since just always repeats the same vowel.
Base | Elong. | Enlong. | -----+--------+---------+ こ | お | う | そ | お | う | と | お | う | の | お | う | ほ | お | う | も | お | う | よ | お | う | ろ | お | う |