As far as I can tell, there hasn't been a comparison between radiators from Barrow/bykski VS other brands like EK.
My temps are great with idle temps hovering around 35 °C. But to be honest, this tell you much as it depends on factors like ambient temperature, water cooling blocks, fans, hardware, overclocks,... etc.
It's up to you what to buy. From my experience, I am happy with my radiator.