Looks like Skyscraperpage thinks the Delta is a tad taller.
http://skyscraperpage.com/diagrams/?s16
As far as all this Regina vs Saskatoon argument. I'd say Regina already has several Corporate head offices. Sasktel, Sask Power, SGI, Sask Energy, those four company's have a presence in Saskatoon as well, but I think they are for the most part Regina headquartered companies.
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