If you are going to use your laptop on battery daily, then get the larger battery, but if you use your laptop with the charging brick plugged into the wall all the time, then get the smaller one.
Bye the way, you might want to replace your charging brick. I swap mine out every 4-5 years.
Good Luck
G752VSK, G75VW-3D, G51J, G1S
Homebuilt Windows Server