Does anyone have any insight as to why the ANZ and ASB trading platfroms show different depth/volume figures etc? Both are live so thats not it. ANZ almost always has more buyers at any given price than ASB. Sometimes there is even a different last trade price.

Todays example: 13/09 12:44 AET - XST.ASX taken within a millisecond of each other

ASB:
Last Change Buy Sell Open High Low VWAP Volume Turnover
$0.013 0.1
8.3%		 $0.013 $0.014 $0.012 $0.013 $0.012 $0.013 26,317,050 $337,470

Buyers
6 2,865,897 $0.013

Sellers
5 2,880,315 $0.014


ANZ:
Last Change Buy Sell Open High Low VWAP Volume Turnover
$0.014 0.2
16.7%		 $0.013 $0.014 $0.012 $0.014 $0.012 $0.013 48,282,621 $621,792


Buyers
13 4,084,382 $0.013

Sellers
14 4,375,861 $0.014