優劣 and 引き分け: uncertain comparison and an actual draw
Separate difficulty judging superiority from a 2–2 draw and a handshake after the draw is decided, without turning uncertainty into a match result.
優劣 (ゆうれつ): a comparison that is hard to settle
「一度の試合だけで両者の優劣を決めることは難しい。」 (“It is difficult to judge which side is better from a single game.”) It is hard to judge superiority from just one match. That does not report a drawn match or establish that the opponents will always be equal.
「二つの案にはそれぞれ利点があり、単純に優劣はつけられない。」 (“Both proposals have strengths, so they cannot be ranked simply.”) Both proposals have strengths, making a simple comparison difficult. The sentence does not identify the final choice or equality under every possible criterion.
引き分け (ひきわけ): a draw and the action afterward
「試合は二対二の引き分けに終わった。」 (“The match ended in a two-to-two draw.”) The match finishes 2–2 in this example. Keep that as its score rather than making 2–2 the definition of every draw.
「引き分けが決まると両選手は笑顔で握手した。」 (“When the draw was declared, the two athletes smiled and shook hands.”) The handshake follows the draw being decided. The Japanese sentence does not add a separate end-of-match announcement or a later match.
Separate a limit on judgment from an outcome
Difficulty deciding 優劣 is a limit on comparison. 引き分け supplies a drawn outcome, so neither piece of information should be invented from the other.
Even a close contest can be hard to assess without stating its score or final result. Read the score and the action after the draw only where those facts are actually supplied.
Does difficulty judging 優劣 from one match mean the match ended in 引き分け?
Show the answer and why
No. It states a limit on judgment rather than an outcome. The separate 2–2 result and handshake after the draw provide actual draw information.