this post was submitted on 24 May 2024
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There shouldn't be much aside from cooking and screen size. This being said, in the U.S. at least the jump to the E14/P15 gen1 on the aftermarket isn't that much in terms of price and the performance has a significant improvement.
T480 (not sure about T580) is a strange beast regarding storage implemantation. I've seen SATA models (worse, slower) and NVMe models (better, rarer?, faster). I own the SATA one and I believe that good part of the performance difference I see between it and a T14 Gen 2 (running same setup and same tasks ) is on account of the faster storage. Among T14 devices NVMe is I believe standard.
Don't all t480 models have both sata and m.2 (made for the smaller 2242 form factor) slots? Or are there full size nvme variants instead of sata?