Yeah, I wouldn't worry.
There are variances in manufacturing fiber goods and printing (ie filter material and cardboard boxes) that probably aren't controlled that tightly because the filters are just going to be plugged inside an engine and the boxes tossed out soon after opening. If you look at the LOT markings on the end (segmented circles and numbers) the filters were produced at different times and/or possibly on different production lines.
I've been using the WIX version of the filter, sold as NAPA Gold brand.