Oh please dont use those bulbs you linked in E-bay. they will be invisible in the daytime and they aren't work spending $5 on.
There are numerous differences between real LED Angel Eyes and the bulbs you listed. The lights you listed are probably 50-100 lumen, while our LUX H8 V3 angel eyes are closer to 800 lumen. Brightness of course is the biggest issue but also the electronic behind the light is HUGE to work correctly correctly with the BMW system and its many modes of dimming it normally goes through