The suffixes ending on Vishay VJ series part numbers ending with 31, 32 or 34 call out -
31 = AEC-Q200 qualified with 100 % matte tin plate finish
32 = AEC-Q200 qualified with tin / lead termination finish
34 = AEC-Q200 qualified with AgPd finish
Source - vj32leadbearingfinishmlccs.pdf (vishay.com)
Source - vj31vj34automlcc.pdf (vishay.com)