I have read about the new upgrades Red Bull brought for the Hungarian GP. Then this means we are likely to watch a much stronger Verstappen but probably it won't be the same for Perez.
Verstappen is getting more ambitious after the competition started to get really heated this season. He would like to push it to the limit at the weekend together with this big upgrade.
Lastly another thing is, Verstappen has already changed his 4th power unit during the 10th race weekend. This means he has no penalty-free change left. When he has no choice other than going for the 5th one, he is going to get a 10-place grid penalty.
https://www.motorsport.com/f1/news/verstappen-set-for-f1-engine-grid-penalty-as-honda-inspection-nears-conclusion/10627269/
As for Perez himself, we can't expect much from him because since the incident in Monaco yesterday it seems like RB won't give him much of an upgrade, and he will only be satisfied with being in a middle position. And for Verstappen, he seems to be getting more ambitious as you say, because other drivers are starting to catch up to him and it will become more difficult for him to maintain P1 position in every race. And that might be the strongest reason to push his limits in order to get the best results.