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.
The full T14 gen 1 goes for about the same price as a T480. Unless you really crave the dual batteries or dual ram slots the T14 is a better machine.
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?
This probably comes too late. But I've been burned too much by this to not spread it across the internet. The T580 with nVidia graphics has terrible thermal throttling making the card totally useless.
I think that's also the case with the T480.
This probably comes too late.
Yup, I've got a P53s now. The deal was too good to not take it.
I don't think it's the case for the T480/580, but for the T14 and T16 machines it's literally the exact same mobo just stuffed into the larger case.
You can get a bigger battery on the T16 at least vs the T14
IBM and Lenovo ThinkPad laptop enthusiasts!