The dentist that work for had a dizzy spell, lost feeling in his right hand. Took him to the ER, check in nurse claimed " what's going on, you are my 6th patient since 9:00 that has had the same symptoms. He's had 3 moderna shots. The hair on my neck stood up.
I'm in Florida, Space Coast area
There is no difference save for the strength of the EM waves (determined by the voltage), and the frequency (determined by the frequency of the AC voltage source).
EM waves are generated any time any charged particle (protons, electrons) move. Any electric circuit and even any chemical reaction will generate EM radiation. Most of the time these EM emissions are so small as to be practically nonexistent.