@WBYeats,
WBYeats wrote:
What's the difference in meaning between
-Results of Okinawa School students compared to that of Japanese Candidates in the AL exam have been released.
Plural 'results' doesn't match singular 'that.' Grammar error.
Quote:-Results of Okinawa School students compared to those of Japanese Candidates in the AL exam have been released.
Plural 'results' match plural 'those.'
It's not that the meaning changes. The reader will understand the message, even in the one with the grammatical flaw. If this were spoken in dialog, nobody would even notice it. Or, if they did, they wouldn't go to the trouble of correcting you.
On the other hand, if you're doing academic writing, then this is exactly the kind of issue that you should be focusing on. Number agreement between pronouns and antecedents.