Comparing Sigma's New 18-50mm f/2.8 to Sony's 16-50 f/3.5-5.6

Photographer Gordon Laing got to test Sigma's newly announced 18-50mm f/2.8 and put it to test against Sony's kit lens.

Sigma 18-50mm f/2.8 DC DN C (Contemporary) Autofocus APS-C Lens for Sony E-Mount, Black {55} at KEH Camera

Sony E PZ 16-50mm F3.5-5.6 OSS Lens Review

Sigma 18-50mm F2.8 DC DN Contemporary Lens Review

Sigma 18-50mm F2.8 DC DN C review - a fine fast zoom for APS-C - Amateur Photographer

I'm thinking about buying a Sony a6400 and I'm not sure which kit lens should I buy, 16-50mm or 18-135mm. Is the 18-135mm a waste of money? I know it is a

Comparing Sigma's New 18-50mm f/2.8 to Sony's 16-50 f/3.5-5.6