Both have Quantized features Both have built in sound cards and can record directly to software DJM-2000 has 6 LAN connections on back of mixer DJM-900 has 1 LAN connection and requires an ethernet switch to connect multiple units and access a computer running Rekordbox DJM-900 has 6 Sound Color Effects that have a hi-pass and low-pass control with 1 knob DJM-2000 has 6 INST FX that uses 2 knobs to control effect DJM-900 has X-pad (touch effects pad) DJM-2000 has 6.5" touchscreen that can control MIDI loops in software, allows for 7 channel cross fader DJM-900 has 13 beat effects on the right side DJM-2000 has 11 effects in the top center and has hi, mid, and low control on the effect