The October 2019 global temperature anomaly that I calculate based on the latest CRUTEM4 station data is 0.15C cooler than that using GHCN-V4 (0.79C as compared to 0.96C). The temperature series are calculated in exactly the same way and both use HadSST3 for ocean temperatures. The only differences lie within the station data. CRU use 7280 stations and give similar results to GHCN-V3. V4 has many more stations (17378) but the data handling is different, even the station IDs have changed and mostly originate from GHCN-Daily.
If we look at the annual averages we can see a clear discrepancy.
The HadCRUT4.6 official temperature is calculated on a 5deg (lat,lon) grid is 0.75C, whereas I am instead Spherical Triangulation which gives results similar to Cowtan & Way. My 3D-H4 results given below.