Have your changed the bulbs on the E53 to a higher temperature bulb?
The E70 is 4300K as it should be.
Do NOT get a higher colour temperature than 4300K as actually get LESS light!
Your also strain your eyes a lot more with the blueish light. Blue is not a color you want when driving at night.

HID bulbs are not in fact blue light, but white. The blue is a result of the lens system in the headlight, and is only cast in the very edge of the light cone.
This has resulted in the popular preception that HIDs are blue.

Take a drive at night with the E70 and see how they perform. Do not make up your mind from the preception based on false information.