Northrop Grumman E-2 Hawkeye (USA) ✈ Yakovlev Yak-44E

Northrop Grumman E-2 Hawkeye (USA). First flight: 21 October 1960 (Wiki)

YAKOVLEV YAK-44E (USSR). Mock-up was completed in 1991 (Wiki, Militaryrussia.com)

The Yakovlev Yak-44 was a proposed twin turboprop Airborne Early Warning (AEW) aircraft, resembling the United States Navy’s E-2 Hawkeye, and intended for use with the Soviet Navy’s Ulyanovsk class supercarriers. Along with the aircraft carrier it would have flown from, the Yak-44 was cancelled after the demise of the Soviet Union. A full-scale mock-up with foldable wings was built.
— Wikipedia