WKS ESF to Shatin Junior

We sent in late application for K1 and was informed for an interview yesterday.
And we eventually got an offer.

School starts next week and of course we have also got an offer in a local kindergarten.

It's really a very sudden happening.

Would like to know how big or slim the chance is for my kid to go to shatin junior we have nothing like debenture or siblings.

If the chance is really slim, is it better we stay in a more competitive local kindergarten?

Many thanks for any advice.