A best gun is the best gun made by a gunmaker . There are some makers who make very expensive guns that would be considers "best ". There are cheaply made guns that have shot thousands of rounds without any problem .There are watches that cost thousands yet my Ł45.00 watch I bought nearly 20 years ago works well and keeps excellent time . My small car is great in the town and on narrow country lanes so a best Rolls or Bugatti would be less good for my needs .
Basically you can talk as much as you like as to which is best but it all come down to what you like , what you can afford and what you use it for and what you dream about .