I didn't see this until after I did my above post, but it's very different. The Soviets were foundationally and nominally Leninist, but pursued an express policy of peaceful coexistence with the West because both sides had nukes. While the Soviets were pretty fucking wild, they wanted to avoid nuclear war because they understood very well that it could end the entire world. Their leaders actually understood the power of nukes, the dire consequences (even if anyone survived), and how dangerous these weapons are.
This led to severe disagreements: Castro told Krushchev, explicitly, to nuke the US during the Cuban Missile Crisis even if that meant Cuba would be annihilated. Mao also condemned Krushchev and basically called him and the Soviets pussies for not starting a nuclear holocaust. Soviet communism was not great by any means, but it was the most realistic because it was, at the time, the most powerful and a serious rival to the US. Now that the US has no peer and the Soviets called it quits, all that's left are the extremist Leninists and the leftover, reform-orienter champagne socialists in Europe.
China is willing to do business with us, economically, but the Soviets were far more diplomatic. We should be very concerned about China building up its nuclear arsenal, which it has done rapidly over the past 5 years. They do have an explicitly no first strike policy, which is good, but there are radicals in their government who want to destroy the US in a literal sense. The best outcome is the US continues to outpace China economically, militarily, and diplomatically, and China keeps its nukes as a "hey, don't fuck with us" policy instead of doing what Iran wants to do.
Or instead of Israel's dangerous-ass nuclear doctrine.