Its not the exact word that Rick Rubin says.He just want to play the aggressiveness,heaviness and exact aura of "Master of Puppets" on the next album.
Thats what Rubin wants.
Okay here it is Bossing...
"I want you to feel like you're starting out again'. He really wants us to get in the mind-set of 'Master of Puppets'. It's impossible to recreate what we were 20 years ago, it's silly, but we had to get that hunger back."
to my understanding Rick didn't want Metallica to "play the aggressiveness,heaviness and exact aura of "Master of Puppets" on the next album" as you've pointed out.
imho, he was trying to inspire Metallica to be in the "mind-set", not the "exact aura"...during the making of Puppets.. you know, the youthfulness, the energy of a young band hungry to play. the business side of music seem to get in the way of Metallica these days.
see... rick even added, "and try to match the intensity and hunger that Linkin Park displayed on my last produced release, Minutes to Midnight"