x-plus

is Abena Abri-Form M4 Fitted Brief, Medium, 14 Count the same as Abena Abri-Form Briefs, X-Plus, Medium, Case/42 (3/14s). I bought a pack of the 14 count M4s and I LOVE the. I wanted to get a case but the only case on amazon says x-plus. is there a difference or are they the same? they use...