Mills MRA two types of different brand ?


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Vishay bought Mills in 2011 and they have been making them ever since, in brown. There were four, color/finish versions of the older, made in the USA, Mills wire wounds: Dull(flat) in either black or brown / shiny and smooth in either black or brown.
@salectric 
thank you
why you prefer the older ones: how do they sound compared to newer ?
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.
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.)?