Details of new SoilGrid data on GEE unclear

I am processing the new 250m resolution, 6 depths (0-5cm, 5-15cm…) data of the ISRIC Soil Grids on GEE, for my region of interest. Currently only the mean prediction is available on GEE for different soil properties. However, I am unclear whether this is what is called ‘Latest’ data which is continously changing based on new data or the’Snapshot’ data which is for July 2016 and Sept 2019? If it is the ‘Snapshot’ data, which is it July 2016 or Sept 2019?