Realtor.com is a trusted general real estate platform with good incentive data. FastLand focuses entirely on new construction with builder comparison tools and market analytics. Realtor.com suits traditional homebuyers. FastLand suits investors and researchers.
FastLand is the better choice if you want dedicated new construction research tools with builder comparisons, city ratings, and data export. Realtor.com is the better choice if traditional home shoppers who trust the realtor brand and want to see builder incentives alongside standard mls listings.