Hi Aaron,
To tell the truth I'm not a style wizard but my opinion is that when a style uses vector based lines it doesn't have a stroke setting while the ones using raster based lines have this setting (since they need these raster images to be defined).
You can "mix" styles in the style dialogue or - if you have a Pro license - you can use Style Builder to create your custom styles.
I'm moving this topic from the Tutorials forum since it is not a tutorial.
Also, read about the basic concepts of styles by Ross here. It will explain things more deeply than my puny answer above.
😉