Might depend on who Lenovo used for the displays. Either the specs are different than listed or it was modded.
My own example is HP, I have 2 identical laptops (same model and seller). One has a 100% sRGB panel and the other has a 60% sRGB panel.
The 100% sRGB panel is LG and the 60% sRGB panel is Innolux.
Also maybe battery capacity over time? Istg batteries have way more degradation now than before.
Edited for clarity.
Edit 2: while some HP laptops might have had different color accuracy display options for the same model, this one is just straight 768p or 1080p and nothing else. The site says 45% NTSC but my own experience shows they had some good panels and it was just luck of the draw. Fwiw the PC is a HP pavilion x360 15-br095ms. It had an i5-7200u, Radeon 530 2GB DDR3, 8 gb of ddr4 and a 128 gb m.2 sata ssd. It’s been motherboard swapped with an 8th gen i7 version, same gpu on the new board and has 24 gb of ram. I’m using a cs900 240 gb 2.5 in ssd for now. I plan on getting a better nvme drive for it eventually but I have none on hand that i could use.