Not in submarines, for one area.
They were getting there. The increasing quietness of Soviet subs throughout the 80s caused quite some concern among NATO ASW specialists.
Electronics, for another.
They outfitted their tanks with things like night-fighting gear and laser range finders before NATO did. There was a difference in quality, of course, but it was not remotely a war winning one. Not even battle winning... engagement-winning at best.
That goes for most of the tech-gaps, really. Sure, some Soviet tankists are liable to get caught in a unfavorable night ambush. And some NATO tank crews will probably have a metaphorical pants-wetting moment when their rounds get deflected by the Soviets latest ERA (that discovery after the wall came down set off some hasty upgrades to NATO ammunition, I'll tell you what). But the generals on either side aren't going to notice it amidst the slaughter.
Their RVs for warheads nowhere near as accurate.
Uh... the Minuteman-III's warheads had a CEP of 200 meters. The variants of the RT-23/SS-24 and UR-100/SS-19 had CEPs ranging from 500 to 150 meters. Not a significant difference with multi-hundred kiloton warheads unless your hitting some really hardened targets, which the somewhat higher yields of the Soviet warheads make-up for.