DxOMark recently has tested the new released Sony FE 24-70mm f/2.8 GM II lens (Amazon/B&H/Adorama). According to the test result, this lens scored 39 points, currently the best standard zoom lens in DxOMark database.
Conclusions from DxOMark:
High-speed F2.8 zooms like this have been used to showcase the best in technology since the type was introduced, but rarely do we see such a considered and thorough overhaul between versions. With this update, Sony has revamped just about everything they could. With all of the enhancements, many would have been satisfied with it equaling its predecessor in optical performance; however, the result is not only the smallest and lightest of its type, but Sony has also raised the bar optically. Given the similar price range (at launch) and the overall improvements, the Sony FE 24-70mm F2.8 GM II is a solid choice over the original and highly attractive option for Sony users or indeed anyone considering the Sony system.