HKIS vs ESF

My girl is currently studying at ESF K1 and she just got an offer on HKIS reception.

I am struggling to change or not - any advise

Pro HKIS, straight through from reception to secondary, good track record n reputation.

Pro ESF, my girl so happy there, my only concern is Kindergarden to primary is not 100% guarantee. However chances are very high @ 99% I was told - but still need interview.

Thanks