The one that offers repair in your office in one day in case it goes south. You wouldn't like it if you had to sent it to a repair center and wait a month before it comes back, as is not unusual with customer grade laptops.
I'm certain Dell has such for business customers (it's not free, of course) in most countries. I don't know about Lenoo and Toshiba where you live.
I'm requesting advice on which of the two laptops is most appropriate to purchase keeping in mind that i need it for business purposes.