Yup, since I don't believe their long burner inserter is used in any recipes, and it does the same thing as mine, it's best to just disable one. I have the graphics modified to match IR's, so it won't look out of place either.
A quick glance at my logic (I haven't actually worked on this mod in a loong while lol), it seems that all long inserters are initially copied directly from their base inserters (taking the entire recipe), replacing any previous inserter with the base form inserter (so a long fast would use the ingredients of a fast inserter, but replacing the yellow inserter ingredient with a fast inserter ingredient).
Then later on, if the "no recipe" setting is enabled (which it is by default), then it removes all but the base form inserter from the recipe. So I'm not sure if the recipes will be "correct" with the setting disabled, but it should use the ingredients from Industrial Revolution, so it shouldn't look out of place.
The setting is mostly a personal preference, since I like free long inserters.