I worked in a boot store for 8 years.
Double H, Carolina, Red Wing, Chippewa and Wolverines are all very good boots. Double H and Carolina are owned by the same company, and Red Wing and Chippewa are sister companies.
Find a store that carries several brands of good quality boots and that will assist you. Stay out of Wal-mart or "Boot R' Us" type stores.
Try on several pairs of different boots. Put them both on and walk around for a couple of minutes on the carpet. All boots are made a little differently, and different boots will fit different people differently. One boot may be the most comfortable that one person has ever worn, and may not fit the next person at all.
Make SURE you have room in the toe, and that the steel is not touching your toe anywhere. If it is, it will cut your toes once it starts breaking in. You will NEVER be able to make them comfortable.