The manufacturer AAF Flanders renamed the Pre-Pleat 40 LPD to the LPD SC awhile back and made some minor changes to the frame design - same filter with a different look.
The LPD stands for "Low Pressure Drop" and the SC stands for "Standard Capacity". The biggest thing is the MERV rating, this has not changed. MERV rating lets us know how well a filter does at pulling particulate out of the air, the old model and new model have the exact same filtering efficiency although they might look a little different. I can assure you this is the same model as we work very closely with the manufacturer.
Attached is a pdf with more info on the new model. If we can be any assistance please let us know.