Well, they're probably different owners targeting different audiences. WWRL 1600 is Hindi pop music and Bollywood hits. WRCR 1700 sounds aimed older. Most of the morning and midday was religious Hindu programming, lectures, chants and religious music. The afternoon sounded secular but older than 1600.
And I'm not sure about 1620 that you mentioned. I don't think there's a 1620 in the NYC area, since WWRL is 1600. I checked for WICR and found those call letters belong to an FM station in Indiana.