HL-3260N and DCP-L5500DN share specifications such as Print Technology (Laser), Ethernet (Yes), Product Brand (Brother).
The main differences: Printer Functions (HL-3260N: Print, DCP-L5500DN: Print, Scan, Copy); Black Print Speed A4 (HL-3260N: 32 ppm, DCP-L5500DN: 42 ppm); Print Resolution (HL-3260N: 600 x 600 dpi, DCP-L5500DN: 1200 x 1200 dpi).
HL-3260N may suit users who need its differing values, while DCP-L5500DN benefits those who need its paired strengths. Review the specs table above before deciding.