Oh duh! Of course, lol.
When I was in the machine quilting class a while back the other gals (with Pfaffs or Janomes) were using the special bobbin case too. I did bobbin work on the Espire with the regular bobbin case.
Now, IF I were to venture into much thicker threads, and do bobbin work more regularly, I would most likely get that one. As is, it handles the fancy threads just fine for me as is.