In 10 years I think the general consensus will be to rate this building ahead of Millennium Tower. At the present moment, MT has 2 distinct advantages over WT:
1. It was here first, the tallest building in 40 years, and got the chance to stand alone for a few years.
2. It was revised UPWARDS beyond our wildest dreams, whereas WT was originally proposed as an impossible supertall, and still well over 700' in the competition phase, so disappoints compared to the original expectations.
However, at the end of the day I'm picking WT over MT for 2 simple reasons. First, while a slanty roof is typically more interesting than a flat roof, MT's open-roofed eye-sore from the South and West is absolutely egregious. Renders showed a covered roof, similar to their shorter Millennium Place towers by the common. WT doesn't have any awkward angles or stand-out blunders like that open roof. Second, the subtle lighting at the top of WT is an absolute breath of fresh air, considering MT often totally disappears into the night.
If MT had covered the roof but not lit it up, I'd probably have MT winning in a photo finish. If MT had both completed the roof and added some lighting, it would be the runaway winner. However, judging the buildings based on their current statuses and not on what "should have" happened leaves me barely choosing WT as the visually superior addition to our city.