Hi Prasanta,

I will call analog instruments as AI and Digital as DI, Let's compare:-

• Accuracy of AI is less while of DI is more.
• AI require more power while DI require less power.
• Sensitivity of AI is more while that of DI is less.
• AI are cheap while DI are costly.
• AI are portable and DI are not that much portable.
• AI are less easy to use while DI are easy to use.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!