Its like you play rickenbacker 4001 bass and fender jazz bass and you cant understand which is which without looking to the headstock.I ran a Leica M4-P with a 50 Summicron next to a Pentax KX with a 50mm Pentax SMC f/1.7 for a year, and I had to look in my notes to tell which was which.
or driving a mercedes and toyota.
Why dont you take two same pictures with these lenses and post here , we will tell you what you need to search for and which quality you might invest at the future.
Equipment and training is everything at a for example war. If you have airplane but no pilot to fly it , you are a loser at another perspective also like Iraqi army. Buying the latest weapon without trained men , .... etc etc.