From my perspective, the upvotes/downvotes are less important info
Their role is different: it’s about quality/incentives, so the appropriate way of deciding visibility (comment ordering) and aggregating into user’s overall footprint/contribution. Agreement clarifies attitude to individual comments without compromising the quality vote, in particular making it straightforward/convenient to express approval/incentivization of disagreed-with comments. In this way agreement vote improves fidelity of the more strategic quality/incentives vote, while communicating an additional tactical fact about each particular comment.
Their role is different: it’s about quality/incentives, so the appropriate way of deciding visibility (comment ordering) and aggregating into user’s overall footprint/contribution. Agreement clarifies attitude to individual comments without compromising the quality vote, in particular making it straightforward/convenient to express approval/incentivization of disagreed-with comments. In this way agreement vote improves fidelity of the more strategic quality/incentives vote, while communicating an additional tactical fact about each particular comment.