Do non-Japanese people think these letters sound similar? Ha•Ba•Pa, Sa•Za and so on.

Ha and Ba and Pa, Sa and Za.

Japanese use は•ば•ぱ and さ•ざ to pronounce these. They just add dots and circle to express them, so I (as a Japanese) think these are similar.

But in English, Ha, Ba, Pa have different appearance, so that made me curious about whether non-Japanese people think they sound different or similar.