Clayking--You'll have to try it yrself to see if your particular pistol cares whether or not it is shooting all-one-manufacturer-brass-reloads, or separated manufacturers.
My (limited) experience is that most .38's are pretty forgiving. But check yours out specifically. If it likes the brass separated, or favors one manufacturer, feed it what it likes.
Separating brass by manufacturer is usually a much bigger deal with rifle reloaders than with reloading for the pistol. In pistol shooting so much depends on the skill and practice of the shooter that small variations in the ammunition are of much lower importance. In rifle shooting there is a lot more inherent accuracy of the weapon, so variations of ammunition--or of anything else--have a much more noticeable effect on the results.
God Bless America