By internally consistent I mean all the mods work together, there is only one type of ores, etc. For instance, I was playing 'Steve's Galaxy', but there are two types of mod related ores that don't stack, but they do smelt together. Like two types of copper from two different mods. Or, I mine an ore called 'Osmium', but it doesn't seem to work with Tinkers Construct.
Watching the AH youtubers, they played Lapito's Galacticraft, and they also commented on conflicting mods and ores.
Is the Galacticraft modpack internally consistent itself? Or do most modpacks have minor issues with the various mods not working together with certain features?