Since Mercedes introduced major updates to the W14 in Monaco, his form situation has shifted in Hamilton's favour.
Seven-time champion Hamilton finished 4th in the second practice session at the Dutch Grand Prix weekend, while Russell remained 14th.
As to why Russell had such a hard time compared to his teammate, team principal Wolff pointed to the switch to the soft tyre.
"I think he was very competitive on the first lap on the middle tyre," Wolff told Sky Sports F1.
“But he wasn't competitive when he put the soft tyre on, so he wasn't able to do much today. I think we'll see what happens tomorrow." said.
Russell's inability to perform on the soft tyre could put the British driver in trouble for Saturday's qualifying.
When asked if Mercedes' W14 car would be more suitable for Hamilton, Wolff said he wanted to wait before making an assessment.
“I think we have to wait now and see how it turns out,” Wolff said. Because we will have more data points.”
“After this race we will go to Monza and Singapore, these are three completely different tracks.”
“We will then decide if there is a change due to the update we made.” said.