Gandalf
Gandalf's wisdom quotient is extraordinarily well-documented. His counsel has saved countless lives and altered the fate of entire continents. Notable quotations include the immortal observation that all we must decide is what to do with the time given to us. He possesses knowledge spanning multiple ages of Middle-earth and maintains the patience to explain things repeatedly to confused hobbits. His guidance success rate among those who actually follow it: essentially perfect.
Love
Love offers no guidance whatsoever. It provides motivation without instruction, urgency without direction, and passion without strategy. Countless humans throughout history have followed love's impulses directly into disaster, scandal, or poorly-considered tattoo decisions. Whilst love may inspire wisdom in retrospect, in the moment it frequently advocates for choices that observers would describe as profoundly unwise. It is an engine without a steering mechanism.