Currently, speed and damage are rated exactly equal. We are considering to change the formula by which rating is calculated to weigh speed higher than damage, because a lot of people deem it more important (and I think, mathematically, it is).
If the first item had the additional damage (16/73/21/51), it’d have a rating of 224
An item with all the low values (15/72/21/49), it’d only be a 211.
That means, that total of 1 damage and 1 + 2 speed is a total rating difference of 13 points.
Likewise, if the second item had a point more damage in secondary instead of primary (15/72/22/49), it’d be a 216, too. In fact, that one point of damage affects rating so much because the corresponding speed is so high.
Edit: Good luck with those ember gloves. I don’t know what the maximum speed is exactly… it’s either 70 or 71.