Mills MRA two types of different brand ?

The older Mills 12w (shiny black) has a bit more detail and has fast, clean high frequencies and is slightly lean in the upper bass although it has tight, powerful deep bass.  They also have a slight edginess in the highs.  The newer version (dull brown) is warm, not lean, slightly soft and dull, and doesn't have quite as much detail.  At least that's how I recall them from a couple years ago.

thank you very much!
 

i have two types of mills mra12
- the first one is dull brown and marked : "mills 1ohm mra12f 1019"
- the second one is shiny brown and marked : "mill mra12 1ohm 1% m1713 mexico"

like these:
http://www.partsconnexion.com/media/product/resistors/mra12.JPG

what is the newer between the two that " is warm, not lean, slightly soft and dull, and doesn’t have quite as much detail " (salectric cit.)?

I cant comment on how the newer ones sound compared to the older ones made in the USA but I would not call the newer brown shinny ones slightly dull and warm. I replaced the sand resistors in my Dynaduio S 25,s with them and they do not sound dull and warm to me compared to how the s 25,s sounded before quite the contrary I would call them fast, detailed, tonally correct with alot more micro dynamics.

i’m refering to the color of boby not sound.