It depends on your hand size. If it's big enough then those two mouse will be perfect for you.
Razer mice is their best line of product. And don't buy certain product because someone say it's bad/good. Because frankly the deathadder is the most popular gaming mouse on the planet and there are people who had great experience with it and also bad experience with it just like any other product even from logitech.
Also razer switches is manufactured in house now so don't worry about the QC. And just FYI I heard logitech mice are using Chinese omron switch rather than Japanese because well their switch aren't manufactured inhouse. Pretty sure corsair didn't make their own switches.
About the fps, it's very subjective but there are reasons why most pro fps player prefer light simple mouse because it's easier to aim with it and it has all the features that they need which is not much BTW. You generally don't want a giant brick mouse like the G502 with tons of button.. I view G502 as a good all around mice that can do gaming as well as productivity but not serious fps gaming.
Zowie make a great fps focused mice their EC series is popular among fps player.
Deathadder is a great mouse, the other is G403, 703, 102/203,305,rival 110,rival 310, roccat kone emp/pure owl,and many more just checkout my guide below or rocketjumpninja.