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.
Its like you play rickenbacker 4001 bass and fender jazz bass and you cant understand which is which without looking to the headstock.
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.