How much faster?

its impossible to say exactly how much faster because it depends on things like internet connection speed, amount of data being sent etc.

UDP is a lot faster because 1, there is no error checking, TCP checks every transaction for errors and if it finds one, it resends the data, UDP will just send the data and thats it, it wont even check if the data got to the destination

and 2, its also a lot faster because there is no handshaking, no connection, it is literally just send the data and hope that it gets there fine.