True, but I think ortho and rads also have a lot in common, there's a lot of imaging and detailed anatomy involved in ortho. Both fields attract people who have good visual spatial skills.
True.
As a side note, this is my personal opinion about different fields:
If you like OR and Major procedures nothing beats Ortho.
If you like OR and clean fine procedures nothing beats Ophtho
If you like Diagnostic aspect of medicine nothing beats Radiology
If you like none of above, nothing beats Derm.
If you are looking for a decent job in medicine with good hours and you don't or can't do Derm, nothing beats Family practice.
It is a harsh statement, but I don't know why people choose any field outside the above-mentioned fields. People, especially medical students may think I am out of my mind, but this is my personal opinion. Family medicine is underrated. General surgery and some other surgical subspecialties are definitely over-rated. ER is overrated.
Choosing a medical specialty is a relatively random process. Most medical students choose a field based on very weak reasons. I have found most medical students and junior residents very uninformed about their field, especially uninformed about real life in pp. On the other hand, most attendings are also very uninformed about "other fields". After 10-20 years in private practice, people have a very tunnel vision even in their own field. Just imagine, you may end up in a small hospital in a rural town or even a big hospital in a big city. That's all you know about your field and other fields. If general surgeons in your hospital suck, you think that general surgery in general sucks. If radiology reports are full of mistakes, you think that is what radiology is everywhere. If your hospital doesn't do liver transplant, you may not even know that liver transplant exists.
The key factor in choosing a field is to see whether you can do it for the next 30 years or not. The rest will come after it. Don't forget that the exciting parts of your field will become routine very soon (even when you become a senior resident), but the annoying parts will become more annoying over time. If being on call every 3rd nigh is annoying to you as a resident, it will become much more annoying when you are 46 with 3 kids at home. On the other hand, by your mid career most of the excitement will be gone.