mundorf m-resist supreme vs jantzen mox and others

so, mills mra need more burn-in time ?
does resistor has burn-in time ?

Yes, they both will change over time. Resistors certainly change over initial burn in time of say 60 hours...

Mills is my go to resistor also... I've tried several,  there are clear differences in resistors,  but to my old ears,  not as much as in good capacitor difference....
"Hot"  means a peak,   normally a slight peak,  in the upper midrange to lower treble region...
just as "Warm" refers to the same in the lower midrange. 

@timlub 
do you tried mundorf mresist supreme ?

@audio4pass
Not sure,  I've been building speakers for a long time... I have definitely tried a couple different Mundorf resistors. I know one was a metal oxide type, because I was comparing it to Lynk, a similar type.  There is no doubt the quality is good,  depending on your needs, I can see preferring any one over the other.