there is no piority of nationality in cadetship, Its based on merit of candidates and i believe that its the best that got selected. As for the comment wise, i guess what u meant will be cadets being malaysian has a better advantage as they are younger as compared to singaporeans in the SQ cadet porgramme... this is because Singaporeans can only apply after the age of 26 due to the regulations with RSAF....
SQ cadet programme is open for all Citizens, SGP PRs and Malaysians.