There is no specific information available describing the differences between the MDDP-50DEN7 and the MDDPE 50DEN model. The technical data and characteristics of the MDDP-50DEN7 indicate a dehumidification capacity of 50 l/24h, a 6-litre tank and a coverage area of up to 100 m², but it is not possible to compare this directly with the MDDPE 50DEN model due to a lack of details on the latter model. I advise you to consult the manufacturer or the manual of the MDDPE 50DEN model directly for an exact comparison.