Ghost (2012)

Both have great suspense and deal with very deep conspiracies.

Hackers, national agencies, nuclear menaces, spies, great plot.

the theme is similar with investigating crimes and catching criminals

Though Ghost relates with computers, both dramas are about crime investigation. Both have addictive crime show elements when watched.

Both have a main character trying to reveal the truth behind someone's death ( in chaser it's his daughter and ghost bestfriend/ many more) both has powerful villains and you hold your breath during the whole drama.

They both involve investigation..they both have small scale cases to solve which is associated with an on going big one.
Both leads have some kind of special ability...
Difference~
One has super natural elements, the other doesn't.

Both main leads are framed, both know who they're dealing with (the culprit) but need evidence. Though one of them is police man (Ghost) and the other is a runaway.

Both are about investigating crimes but ghost is more cyber related and they're solving one crime.

both dramas have to do with hacking and are both exciting and full of suspense!

1. Action/thriller genre
2. Revenge
3. Corruption
4. Action packed
5. Hackers
6. No romance ?

Not NIS agents but they're from cyber crime unit. Together they investigate cyber crime and fight against cyber crime/hackers/corruption.

Same writer and same director. Both begins with a celebrity dying and the main character trying to reveal the truth behind it. Pretty much give the same feeling. Both worth watching.

It's also a crime drama that develops quite nicely and very unexpectly. There are many twists and surprises.

it's almost the same story..but only in ghost drama it's not really you can see ghost only fake..

Both are thriller dramas solving a pile of crimes. The difference is that in Virus Uhm Ki Joon plays the protagonist while in Ghost he's the antagonist. Also an other difference is that Virus is... about Virus' and Ghost is about hacking.

However both gives me the same thrilling feel and both have amazing soundtrack too.

Both shows have very similar feel to them .. in both dramas the lead is framed of a murder crime .. in both shows they don't emphasize romance and rather the crime and investigations ...