As per your PM, the vendor page is useless for revision or bios version information. They never list that data there. You would need to either contact the sales department for verification of the exact sku number, and then reference that sku on the MSI website. Since you're looking at b&h photo, I'm assuming you're in the US in which case it's probably extremely unlikely to get an older revision as b&h is a high volume vendor and would only be likely to have newer stock or they'd ship directly from the manufacturer.
I wouldn't worry about the PCPartpicker flag in this case if you are in the USA. By now it's unlikely you would receive an older model regardless of your location outside the US, but IS still technically possible, which is...