The prosecutor is allowed to repeatedly quote Luke Harding's account of what Assange supposedly said, but Goetz isn't allowed to give his opinion - which is apparently very different from that of Harding. Harding's personal hatred of Assange is well known, and he published this false (and as-of-yet un-retracted) story [1] about Assange supposedly meeting with Manafort in the Ecuadorian embassy, so it's entirely plausible that Goetz' "memory" of what Assange said is more accurate than Harding's.
It's been pretty clear throughout this story that the judge is very unfavorable towards Assange. They're just going through the formalities, but we can all guess what the outcome will be - unless there's enough political pressure on the UK government to stop the extradition.
1. https://www.theguardian.com/us-news/2018/nov/27/manafort-hel...