When? If we are talking 1946 vs. 1975 vs. 1988 the answers vary wildly
More importantly, you can't really know even if you do a really serious analysis of the two sides equipment and manpower. Both countries built their conventional forces based on the Bomb's availability and the tactical plans they had for its use.
BTW: This subject is VERY well plowed ground. You may want to do so searching for previous threads.