HL-L5000D and ECOSYS M2640idw share specifications such as Black Print Speed A4 (42 ppm), Automatic Duplex Printing (Yes), USB (Yes), Maximum Paper Size (Legal).
The main differences: Printer Functions (HL-L5000D: Print, ECOSYS M2640idw: Print, copy, color scan, fax); Print Technology (HL-L5000D: Laser, ECOSYS M2640idw: Kyocera ECOSYS laser); Print Resolution (HL-L5000D: 1200 x 1200 dpi, ECOSYS M2640idw: 600 x 600; up to Fine 1200 dpi).
HL-L5000D may suit users who need its differing values, while ECOSYS M2640idw benefits those who need its paired strengths. Review the specs table above before deciding.