In this price range, the Intel Core Ultra 7 155H CPU is not exactly great for performance (and, as a matter of fact, Core Ultra CPUs are a general disappointment
especially for gaming, regardless of the price point). The Core i7-13650HX in my Asus TUF Gaming F16 (2024) actually scores ~25% better than it, according to PassMark. I know.. this laptop only has an RTX 4060 and a 512 GB NVMe SSD with one extra (empty) M.2 NVMe PCIe 4.0 slot for optional upgrades. For reasons that should be completely obvious, the RTX 4060 is slower than the RTX 4070. But the Core i7-13650HX makes up for it in CPU bound games, which almost all top rated modern games titles are. If you are planning to play these types of games with the AC adapter always plugged in, the power hungriness of the Core i7-13650HX in this laptop is not a concern, and that makes the F16 (2024) a worthy alternative choice. Sure, the Alienware has the fancy 2560x1600 screen with 240 Hz. Then again, having more pixels also means that you will be needing more compute power for it to keep up with fps. More compute power, which, unfortunately, the Core Ultra 7 155H simply does not have.
EDIT: Also consider this one IMO:
Amazon.com
AMD Ryzen 9 7940HX is ranked a whopping ~115% higher than Intel Core Ultra 7 155H on PassMark.