Jeans from the same brand and with the same size and style may fit differently due to a variety of factors. Here are a few possible reasons:

1. Manufacturing differences: Even though two pairs of jeans may have the same size and style, there may be slight differences in how they were manufactured, such as variations in the stitching or the placement of the pockets. These small differences can affect how the jeans fit and feel.
2. Fabric variations: The fabric used to make jeans can vary from one batch to another, even within the same brand. For example, one batch of jeans may be made with a slightly stretchier fabric than another batch, which can affect how they fit.