Depends Rane 62 Has some dope features like hook up to usb devices to switch between people. Which means you dont have to stop the music. ONLY 2 Channels vs Pioneer 900 Nexus 4 channels..

It all comes down to preference in how much you wanna spend.. I use The Pioneer 400 I like it the effects are all there...

(Also Think about how you would connect the mixer to the Speakers.. Ex . Rca...XLR..Quarter Inch..etc.. )

Both mixers has XLR out.
But you're comparing Apples to Oranges here. Do you already own the Sixty-Eight?
Personally I prefer Rane, and will probably get the 62 later this year.

Basically:
62: 2 usb ports/2 SSL laptops at once one the same mixer, sound card built in. SSL controls for loops, cues, 2 "fader channels" + 1 extra channel without fader, but full eq and filter on all. built in FX. Great sound & build quality
900: no SSL sound card, but can run another DAW or traktor. 4 fader channels, built in FX.

Your best bet is to actually try them both before buying....

Well i'm in the same boat, looking at either the 62 or a 900 with sl4 (that's an extra 800 bucks probably for the box), ultimately looking for the most powerful combination