The one that's best is the one which is best suited to your needs. If you have small hands or are looking for a concealed carry piece, the Glock 21, for example, is probably not your best choice, and the Glock 26 would probably be a much better choice for you. The standards of manufacture are the same throughout the entire Glock line. The Glock that is "best" for you will be base on, in part, your hand size/strength, recoil sensitivity, pocketbook and what, if any, experience you've had with Glocks. Look for an NRA certified instructor.
Very likely, it's the Glock. Glock in general is the best selling pistol in the commercial and law enforcement market.
Glock
You would have to define best- what what use.
Federal premium ammo
Glock 17, Glock 18, Glock 19, Glock 26, Glock 34, and, if you count the 9x17/.380 ACP in this running, the Glock 25 and Glock 28.
"Best" is a very subjective measure. Barrels by any major barrel manufacturer or by Glock would not be a poor choice.
The company that manufactures the Glock 35 is Glock. The Glock company has been producing glocks since 1982. The creator of the Glock is Gaton Glock.
I have no experience with the Browning. I carry a Glock on duty and carry a Baretta in the Army. I rarely ever clean my Glock and it shoots perfectly every time. My Baretta needs to be spotless to fire correctly. I'd take a Glock any day in a combat situation.
No, they are different calibers. A Glock 17 is 9mm and a Glock 23 is .40 S&W. A Glock 22 magazine would fit in a Glock 23.
The one that's best is the one which is best suited to your needs. If you have small hands or are looking for a concealed carry piece, the Glock 21, for example, is probably not your best choice, and the Glock 26 would probably be a much better choice for you. The standards of manufacture are the same throughout the entire Glock line.
the best brand of 9 mm that the police use is the glock