The ARAY 250S is a very well constructed grow light. The PPFD map is very consistent and even in a 80cmx80cm area, with not a lot of difference between min and max.
I don't have any experience with other big brand lights, but I would still recommend this light, as I have had a great experience with it this grow.
Only point I have is that the light will benefit a lot from an active airflow across the heat sink, on both the light and the led driver, as these can get quite warm (note, not hot!!).