What is the best reservation system for airline 1- Amadeus 2- Sabre Red?

form my experience sabre is a good and easy to learn with a lot of services app but the advantage of Amadeus so far it's the main system for a lot of airlines

both of them  for the pricing  Saber system and  avilablty  Amadeus Saystem

It should be user friendly with all options. 

Any system travel agent can use proffesionally to make booking and reissue and refund and revalidation will be great for him 
for someone like me i used both of them but i prefere amadeus as it's most used during my career