Well to be more balanced, lets look at it from 2 angles.
1. If SAS is too far... why bother? Its a torture to send your child to school early in the morning and get home late.
2. However If you are looking at sending your child to an environment of similar culture, SAS is a better choice.
3. Then again if you want your child to be exposed to a varied culture environment, eton is good.
4. Eton have great reputation, regardless of location. Personally i would choose an Eton near my place. Convenient for me, convenient for child. (Unless you intend to be a stay home mom)
5. Depending on what is your focus, academics, or their childhood. I have no comments on which is better, but generally preschools in singapore- regardless of whether they are
International Schools or local schools-focus more on achievements.
I hope this helped, i'll try to upload some articles from the local paper for your reference.