Hi Sushimushi,

not sure whether this answer your question. But i'm using https://www.propsocial.my/ to gather such data. But i'm more into subsale unit..

they also have the new development unit review as well..for example https://www.propsocial.my/property/7466/sungai-buloh/sqwhere .. u may scroll down and they have the comparison chart for nearby neighbourhood

Hope this may help