torn between mac studio m4 ultra and alienware area 51 5090

So I plan on getting a new computer this year. I am currently looking at the Mac Studio M4 Ultra and the Alienware Area 51 5090 laptop.

I am a CS major and I'll need it mainly for AI/ML training and doing data science stuff.

The reason I didn't look at windows desktop pcs is because as an international student I really need the portability of the computer.

So here are some of my considerations:

M4 Ultra Mac Studio:

PROS: The beast of a machine, very powerful CPU and Gpu, capable of doing any professional task you throw at it. I have been using Macs since I was a kid and am familiar with the Mac OS system. I am also deep in Apple's ecosystem, having an iPhone, iPad, Watch, Macbook Pro... so I will feel completely at home with another Mac. Also Macs are very, very durable and their desktops can last for literally decades.

CONS: Like any mac, sucks at gaming. I don't game much but I'd like to explore some games. Also the exact release date is still unclear, will probably come in June which is 3 months later than the Alienware Area 51.

Alienware:

PROS: Very powerful, armed with the latest top notch 5090 gpu, 240 hz screen refresh rate, great compatibility. will be able to run any game on the market. I do not yet have a windows computer and having one will broaden the amount of tasks I am capable of doing. Release will be in Q1 2025 so comes earlier than the Mac Studio.

CONS: Dell's quality control, The Windows system is problematic and buggy, won't last as long as Macs, higher maintenance requirements like repasting, repairs etc (I mean, at the end of the day, an expensive PC is still a PC!). Also less RAM (I am planning on getting 128gb for the Mac but Alienware 51 laptops max out at 64gb).

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TL DR: I am looking to buy a new computer and am torn between the Mac Studio M4 Ultra coming this June, and the Alienware Area 51 laptop with 5090 coming this March. I have been a lifetime Apple user and feel at home with macos, but am open to exploring gaming and trying something new??

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Which one should I get?