discriminating

showing or indicating careful judgment and discernment especially in matters of taste

• “the discriminating eye of the connoisseur”

marked by the ability to see or make fine distinctions

• “discriminate judgments”
• “discriminate people”

having or demonstrating ability to recognize or draw fine distinctions

• “an acute observer of politics and politicians”
• “incisive comments”
• “icy knifelike reasoning”
• “as sharp and incisive as the stroke of a fang”
• “penetrating insight”
• “frequent penetrative observations”