Laptop

Desktop

Cost

Slightly Costlier

Lowest

Portability

Designed for Portability

Designed for Stationary

Upgrade Capability

Limited to RAM, HDD

Some models everything is molded and cannot be replaced (see models where RAM, HDD Can’t replace here)

All Components

Repair / Maintenance

Expensive

Difficult, sometimes non repairable

Low cost

Easy as most components are swap-able

Screen Size

11.1″, 13.3″, 14.1, 15.6″, 17.1″

14.1 & 15.6″ are common

15.6″

19″

20″

22″

24″

27″

32″ 

19″ is common

Additional Cost Involved

1.       Mouse

2.       Dock

3.       Screen Protector (Keyboard marks on screen)

UPS

Wi-Fi / Bluetooth

Things to Consider

1.       Screen Damage

2.       Liquid Spillage on Keyboard

3.       Hinge’s breakage

4.       Battery life due to improper recharging