This user discussion applies BLF9121 but lockers are technically identical and it's just the size that distinguishes them. On paper, you get a shelf and 30 liters of extra refrigerator compartment on BLF9121 IFH. to 12cm lower BLF8121. The freezer compartment is just as great. The main reason I chose to purchase this appliance was the low noise level of only 38db. This is so quiet that one can hear the coolant circulate, while the compressor is on! It has Whirlpool "less-frost" in the refrigerated section, but not no-frost or air circulation, which often doubles the noise level (note that an increase of 5 dB represents a doubling of the noise).