ECMWF data in OCN of Sentinal-1A/B

Hi, I’m trying to learn how to use sentinal-1 data in my machine learning network. While I see that ESA offerd the owi_wind_speed and owi_ECMWF_wind_speed in OCN data file. However the relevance seems pretty poor in SNAP. I wonder how reliable can I trust the ECMWF data offered in OCN data, and is there more information can I find about this ECMWF data. Cause the resolution of offered ECMWF data is far more higher than ERA5 or TCo1279 HRES.