For ur second qns about which one more recognized internationally, the ans would be CA(singapore) in very near future. WHY? The outset CA(singapore) is to be prestigious. They are likely to get mutual recognition with Aus, UK, USA and Hong Kong.
On the other hand, ACCA aims to promote and improve accounting standards and education globally, not trying to be the most prestigious qualification. If you read up more about ACCA, you will notice that they have joint exam scheme with many developing countries like Vietnam, Thailand, Greece, Jamaica, Cambodia, Cyprus, etc..
Trust me, spend some $$ take an accounting degree first. If the new CA(singapore) choose not to recognise ACCA, it will be much harder for ACCA affiliate to find jobs in singapore. Without exp you cannot qualify as ACCA member. Not any suka suka acct asst jobs can qualify u as ACCA member