Can't help with the 1982 comparison, but...
Yes, complicated business, comparing pups....had DRY Zs in my recently departed SA-1200 (335), and though excellent, I slightly prefer the less regarded/reported U-4000s in my '78 SA-900 (335) - more of a snarling 'rock' tone. May be the axe as Mark F says. Mind you, I have an EGF1200 (again via Mark) on the way and am more than happy to accept that will prove the match made in heaven!
I'll report in a few days time (come on Parcelforce!).
Then again, it could also all be in the fingers....ears....etc