That's an outdated rendering, though still very similar to the design they went with. You can see updated renderings of the Union Towers on Architizer: https://architizer.com/projects/station-park/ as well as some architectural sketches of the other 3 towers here: https://www.waterlooregionconnected.com/...php?tid=38&pid=89346#pid89346
There's also a video of the acrylic tabletop models of the project here, though it lacks the 44 floor tower (but it does show the 10 floor office tower that will now be attached to it) as that was not yet conceived when the sales building went up, where they had the acrylic models: https://videos.ctfassets.net/bo97ukda0u2...020-sm.mp4
There's also a video of the acrylic tabletop models of the project here, though it lacks the 44 floor tower (but it does show the 10 floor office tower that will now be attached to it) as that was not yet conceived when the sales building went up, where they had the acrylic models: https://videos.ctfassets.net/bo97ukda0u2...020-sm.mp4