The most useful sibling is also 10.5
Compare this W listing with Brown 10.5 when you want to clarify width availability without immediately changing length. First confirm what width the other listing actually selects, since its title does not specify one. The comparison is between variants of Keele Ridge, not between two waterproof technologies or different safety classes.
Why the upper construction matters
Timberland describes the Keele Ridge family with leather-and-mesh panels over waterproof membrane construction. The panel mix is a useful feature to understand when choosing between this work hiker and a more conventional leather boot. It does not mean that the exterior mesh makes the boot suitable for every liquid or that the membrane eliminates all internal moisture.
Wide versus more height over the foot
W tells you which width option the listing claims; it does not specify the cap’s vertical clearance. If an orthotic is part of your work setup, confirm that the proposed insert preserves the boot’s required protection and evaluate the completed arrangement. More width cannot be assumed to offset a device that lifts the toes toward the cap.
The related Brown 12 W keeps the wide label but increases length. It is not an alternative when 10.5 is already correct. If the same-length wide option solves side restriction but leaves the rearfoot moving, compare another suitable work-hiker shape instead of treating the largest available volume as the safest bet.