I thought that this was pretty interesting since I have Tamron Lenses. Not looking to get it but it is interesting.

Sony E-Mount 18-200mm vs Tamron E-Mount 18-200mm Using the Sony Nex-7 - YouTube

I saw another one:

TAMRON 18-200mm F/3.5-6.3 Di Ⅲ VC Model B011 vs. SONY SEL18200 - YouTube