pretty much the same,
the newer posi's have the mark twain type of posi, a shitload of little breakable watch sized gears and such but you can get the c clips out. It isnt as easy as the old style but still do-able, after you pop the axles out its the same deal, pop in your claw hammer to pull the seal, silicone the new one, make a block of wood to fit pound it in and you will be done in an hour if everything fairs well.
Good luck!
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy