Are the Miller II boots good for everyday wear?

Yes. The cushioned insole, padded collar and rubber lug sole are built for walking, not just standing. The leather-and-textile upper is dressier than a sneaker but less formal than an all-leather dress boot.

How do I care for the houndstooth textile vamp?

Brush off dust and spot-clean the fabric with a damp cloth and mild soap, then let it air dry. Keep polish and conditioner on the leather panels only, since wax on the textile can darken or stiffen it.

Do the boots run true to size?

There is no sizing guidance to go on, so try your usual boot size first. The padded collar and heel counter hold the ankle snugly, which helps if you are between sizes.

No. The textile vamp and stitched leather panels are not sealed against water. The lugged rubber outsole gives grip on wet ground, but heavy rain will soak the upper.

What is the difference between the Miller II and a plain leather brogue boot?

The Miller II swaps a full leather upper for leather panels around a houndstooth textile vamp, and uses a deeply treaded rubber sole instead of a leather dress sole. That makes it more textured and grippier, but less formal and harder to clean.