I have the older "beige" color and it didn't work well with the IR sensor. I'm sure @dc42 will weigh in when he has a chance but I'd think the black matte surface would give the best/most consistent results.
I would think that a clear material would create too much opportunity for reflections from the top surface as well as the bed especially if the adhesive isn't perfectly bonded to the bed in placed. On the other hand, it worked for you previously.