IF their 'O'-Levels meet the same international standard, especially in Maths and Science.
I studied in Singapore for majority of my life till I came over here at the age of 15. I opted to take a year back to to coursework at Year 10 and finish the whole GCSE properly - turns out my 'Secondary 3' standards in Singapore was the equivilent of 'GCSE' here. My Maths and Science level was essentially 'held' the same level for 2 years till I got to AS level, which finally match Singapore's O Level standard.
Yes it was an easy ride for me, apart from Food Technology, everything was A and A*, but when I went into A-Level, there was this bridge between GCSE Maths and AS Maths, college had to spend the first half of the semester bring student up to speed - it's a waste in my option.
Lets see where this will lead, will it be naming it O Level with same GCSE level or will it be more of the international equivilent that they do with Republic schools such as those in Singapore.