u/Eco_packed

I am exploring the second hand laptops market and 2 laptops crossed my eye one is Asus scar 15 2022, which offers 3080ti 16Gb vram with i9 vs asus tuf 4070 8gb vram with ryzen 9 8945H. Which one should i go for. I am getting at half the price of brand new. And how many years will it last?