How Can Riders Avoid Low Quality Genuine Bike Parts?

I recently needed to replace a worn motorcycle component and found several parts that looked almost identical but had noticeable differences in finishing and packaging. This made me more careful about choosing genuine bike parts for regular maintenance. I now think checking the correct model, part number, build quality, and proper fitting is important before buying. What other signs do experienced riders look for when checking whether a bike part is genuinely suitable and reliable?