But its not exactly the same is the systems that you will deploy to - ideally you'd develop on identical hardware. At BT we brought or dev test and live from t

But its not exactly the same is the systems that you will deploy to - ideally you'd develop on identical hardware. At BT we brought or dev test and live from the same production run so they where identical down to the particular rev of the MB our sysadmin guy also would have liked to make sure that any disks we brought where all from the same batch plus spares :-)