How much better is the Sigma 17-40 f1.8 vs 18-50 f2.8

[Emmaus]

Hi All,

I just picked up the Sigma 18-50 f2.8 rf for my R7, and I like it quite a lot. It's perfect to carry around on hikes. Sharp enough to take good photos, and very light and compact. I compared it with my EF mount Sigma 18-35 f1.8 art, and it stacked up pretty well, considering the size.. Have any of you compared the 18-50 to the 17-40 f1.8 art? What were your impressions? In your opinion would it be worth owning both? (I would keep the 18-50 regardless because of the compact size for longer hikes)

Thanks in advance,

Dale