The wraith coolers are a step above the flimsy aliminium blocks that cost $2.50 that intel ships with their CPU's, I cooled my 1600 overclocked to 3.8 on the included wraith stealth and it was more than adequate though temps were higher than my current Raijintek Leto pro, albeit not enough to throttle like the cheap chinese junk Intel has shipped for the last 15 years or so, still if you want to overclock and aren't comfortable with temps up to the high 80's (still perfectly fine and within spec btw) then aftermarket is still your best option. As to the Op, I suspect as someone else has also mentioned the aliminium wraith is likely for a 65w TDP part and the copper core likely for a 95w TDP part, think 1600 65w TDP Vs 1600x 95w TDP