I find the leather cream better than polish for my aged boots.  It soaks into the leather and seems to preserve it better than polish and keeps the color brighter.  It takes more to apply as it goes into the leather an a jar doesn't last as long as a can of polish, but I find the moistening of the leather seems to make it more pliable and seems to preserve it.  More expensive but with $150 pair of western boots they are worth the extra expense.