We went to Coral Sea last year but have booked the HV this year (4 weeks now, can't wait).
From reading the reviews and speaking to someone we know who went to HV last year, we expect it to be very similar or same standards as Coral Sea which we found fantastic btw
The reason we opted for HV this time, as we would return to CSR, is there looks a lot more to do in the daytime for the children. Of course the fact also that HV is much larger than CSR, so obviously HV has many more people to cater for than CSR. Therefore CSR probably has a more relaxed atmosphere.
A friend we made last year at CSR said she originally wanted to book for HV, but her friend who is a travel agent, advised her to book CSR instead as everybody who returns raves about it! (She funnily enough has booked HV for August this year also).
We loved our stay at CSR last year and the reason we are not worried this year about our choice is because they are part of the same hotel chain.

Thanks Beth,
We absolutely love HV and we are looking to go back for a 3rd time next year. Its just the excitement goes a bit as you now all about the hotel etc.