Hello,
Radiology is a specialisation in which you help in diagnosis and pediatrics is a specialisation in which you treat diseases in children.
Radiology:
Pros-
You have a basic idea about all diseases and you play a major role in diagnosis. Radiologists are required for diagnosis in every field be it medicine surgery obg pediatrics orthopaedics etc
Nowadays invasive radiology is a growing field where you can treat a patient without invasive surgery
Radiology pays more than pediatrics at least initially
There are no emergencies so you can have more time for family.
Cons-
If you like interaction with patients you will not be able to interact mostly.
It is easier to set up private practice in pediatrics than in radiology as machines cost a lot.
You must be good in physics as you have to understand the application of physics in the various medical devices.
You are exposed to harmful X rays. This is not major but you should not expose yourself for more than a particular number of hours.
Pediatrics-
Pros-
You get to deal with actual patients
Easy to set up private practice
Satisfaction of treating patients.
Cons-
Risk of getting diseases
Emergencies are common - may affect your personal life
Less money than radiology but more hours. However earnings increase with popularity and private practice
Ultimately the choice depends on which you like more analytical work reading X rays, ultrasound, CT scan making a diagnosis or actual interaction with patients and the satisfaction of treating them
It also depends on whether you are ready for a lot of emergencies or you want a laid back lifestyle.

Hello,

Actually Radiology is the most preferred in all cases than pediatrics. In case of monetarily or academically radiology is best.

In all over india there is not vast but obviously  sufficient scopes for radiologist. Always radiologist have the most preferences to do there jobs in a while with experience.

So radiology is the preferable.

Hope it helps you.

Thank you.