請告訴我 「實力相當」 的英語！

・it is difficult to say which of the two

「實力相當」可以說「It is difficult/hard to say which of the two is better」。

It is difficult to say 是 "很難說～" 的意思，
which of the two is better 則是 "哪個比較好" 的意思，
所以 It is difficult/hard to say which of the two is better 是 "實力相當" 或 "很難分出高下" 的意思。

▼ It is hard to say which of the two companies is better.
　　「兩家公司很難分出高下。」

▼ It is hard to say which is better, as both products are attractive.
　　「兩種產品都很有吸引力，難以評判哪個更好。」

希望對你有所幫助。

有幫助｜0