I had exactly the same dilemma - but for a different reason. DS was in nursery, great, he was happy, but it was English-medium, and we wanted him to go to Welsh-medium school. He was offered an early start (January), as he's an October baby, and we had to decided whether to move him, or whether to have him start at the pre-school in the September. Eventually we moved him to start at the Welsh-medium pre-school, with a CM as wrap-around care, and we couldn't be happier with the choice we've made. However, these were the reasons we finally came around to the idea of taking him out of his nursery ...
- Lack of flexibility of the nursery.
- His 2 main key workers left the nursery.
- The staff of the nursery, although wonderful, were nursery nurses rather than nursery teachers.
- We wanted him to get into a Welsh-medium environment sooner rather than later.
- The pre-school was in the same building as the primary school he would be going to (in fact, in the room next door to the reception class)
- He was ready for pre-school - knew his numbers, his letters, was getting a bit bored at nursery.
The last 2 reasons were the most important of all of them - what worked for us may not be a good reason for you.
DS will be going into the reception class in September with all of his friends from the pre-school class - he already knows the teacher (and LSAs) of that class, as they've visited the reception class on several occasions.
As far as he is concerned, he's already at school - it's just that in September, he gets to stay all day ....
If dd is ready for a school environment, then it may be better for her to go into that environment now, rather than wait, where she may be the eldest, and not be stimulated enough.
Good luck with making the decision.