But no matter what, just choose the one you feel is more suitable for you.
Don't do both at the same time, as its a waste of money and time (time split studying for both can be spent more wiser studying harder for 1)
I was in the same situation as you before, whether to choose SIM RMIT or ACCA.
In the end I chose ACCA because personally, I find it more recognized in Singapore. (Graduate in ACCA then work my way to Singapore CPA unlike RMIT whereby you get Aus CPA first)
Sure it may be hard, but its do-able if you put in the hard work.
No pain = no gain
Easy Qualification may not appear as good as it seems.
Doing ACCA gives me better confidence in being an accountant in future.
my 2 cents