Tamron AF 28-300mm VC vs Sigma 18-200mm

[cgntoonartist]

Hello Folks,

Is anyone experienced with the "Tamron AF 28-300mm f/3.5-6.3 XR Di LD VC Aspherical (IF) Macro Zoom Lens with Built in Motor"?

Is it a good lens? How does it compare to the "Sigma AF 18-200mm f/3.5-6.3 DC OS" Lens?

Cheers