I often make coffee ice cream using the recipe in the Serendipity recipe book. I haven’t tried the other recipes so I have no basis of comparison.
The Serendipity recipe is divine, though. Seep 3/4 cup whole decaf espresso beans in 2 cups of milk (bring just to a boil, then remove from heat, cover, and let sit for 20 minutes. Beat 4 egg yolks with 1 cup of sugar (3-5 minutes). Strain the milk into the egg yolk mixture (you’re now done with the beans) and cook over low heat until the temperature reaches 160 degrees F (don’t go above that, it will curdle the eggs). Mix that with 2 tsp flour, 1 cup of light cream, and 1/4 tsp of salt, and let it sit in the fridge overnight. Mix in 1/2 tsp vanilla extract before putting it in the ice cream maker.