qsfp; passive; compatibility

I need to buy 5x QSFP-QSFP passive 2m cables. I have mellanox cards and a mellanox switch. The prescribed parts are very expensive and rare in the used bin, but there are much cheaper 2m cables from NetApp that are QSFP-QSFP. So, in the infiniband world, are all QSFP cables equally compatible...