W540 or T540 whats the biggest differents?

Hey.
Im new in here, ím sorry if my question is in the wrong topic.
Im considere to buy a new Lenovo thinkpad laptop, but i can decide between T model and W model, so can anyone tell me, what is the biggest different betwen this two models, and why pay more for the W model.
im gonna use the laptop for work, and it will be connected to at docking station allmost all the time, and im gonna use the laptop for develop.
Kind regards Martin.
Solved!
Go to Solution.

To say it another way...the W sports twice the slots, a real gpu, and a big boy quad-proc. On paper the 540 looks pretty but in real life the 530>540. Some reading 4u, bench away and take just 20 minutes to poke around on all the forums with disgusted owners. After buying about two dozen, we stopped sourcing 4/540's and went with M4800's when 4th Gens or QHD are a must for our engineers and designers.
W530 | 3840QM | 32g @ 1.35v CL9 1986z | 512g 840 Pro | 1t HGST 7200 | FHD AUO v.4 | Quadro K2k | GOBI 5k | Centrino 6300

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