Which Company Laptop is best? Hardware-wise, and Performance-wise.

Hardware wise: toshiba

Performance wise: Apple

in case of Microsoft or Linux OS i will suggest HP brand,

IBM - Lenovo is best, i have Z series using from last 5 years not a single complain till today. finger cross. 

I have used Dell computer for servers in clouds.

Networking Point of view i think Tinkpad lenov is the best 

DELL

1. Dell 2. Lenovo 3. Samsung 4. HP 5. Acer 6. Apple 7. Sony 8. Fojistu 9. Toshiba 10. Asus