In truth, the SNR Enhanced mode in Resolve - which they give you free with Resolve Studio - is almost as good and is already included. Their latest version is the best they've ever done and is made especially for Resolve. Short version: I think Neat does a better job overall but a) it costs more money, b) it takes more time, and c) it's very tweaky and has a lot of settings you have to carefully adjust for best results. (Note that this is a pay site, but I think the information they provide is worth the investment.)
Bowdach just did a fantastic half-hour 2-part video comparing and contrasting Resolve 16 TNR/SNR with the latest Neat Video v5 over on.
