The average anomaly for April 2017 of HADCRUT4.5 using Spherical Triangulation (ST) is 0.80C. This is 0.06C higher than the standard 5 degree gridded result (0.74C).
It is the years which have high Arctic anomalies which differ the most. Here is the spatial dependence for April which is still showing net Arctic ‘warmth’.
Finally here is a comparison between H4.5-ST and GHCNV3-ST.
The main difference is the sampling pool of land stations.