Which of these two laptops should I consider buying?

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I understand that these are both very expensive and to a lot of people ‘not worth it’, but it’s something that I kind of need. Also, this is in AUD (1USD is about 1.5-2AUD) I’m a film student/musician and I also play a lot of games - I’m one of the few people out there that benefit from some of these extreme upgrades beyond just gaming. Beyond that, I need something portable; ill be out of the country on an exchange for about 6 months so I need something that can rival a desktop but also still come with me for my studies and let me play games whilst I’m away. If I didn’t have to worry about studies I’d easily just build a high end desktop, but that can’t necessarily come into classes with me.

As for the price, I have access to some discounts that should bring the price of both to around 4000-5000AUD. Still hefty but nowhere near as bad as it is by default

Now for the comparison, it’s essentially between a 4090 with double the ram and an older ultra 9 cpu or a 5080 with half the ram and the latest ultra 9. What do you guys think?

Tl:Dr which one is more worth it considering I can get the 5080 for about $4300AUD and the 5090 for around $5000AUD