There are no doubt conflicts. Mods in the "Additional Mods" section of the list are not included in my config pack. Using your utility though that could be easily solved.
In the future I may include configs to get these mods to work too. With Biomes O' Plenty merging with XBXL in it's next iteration I don't see the point for that though. It's also probably best to just use one or the other for biome generation now anyways, mixing and matching may have undesirable consequences.