The singer-songwriter said that his brother couldn't have understood the instinctive meaning behind many of Oasis's hits because he didn't write them.
Noel told the Yorkshire Evening Post: "I often thought Liam's role in Oasis must have been difficult, singing somebody else's songs. You can read the words and understand [literally] what they mean but you don't instinctively understand them."
Talking about his solo project Noel Gallagher's High Flying Birds, he added: "I know when I write a song now how it's going to sound when I finish it in the studio. 'If I Had A Gun' is obviously a love song but I know what it's about.
"When I'm singing I know what it means, I know who the person is, I can deliver its sentiment a little better. All the other songs I can deliver the lines with the story. I wrote it so I know what it means."
Noel is nominated for best 'British Male Solo Artist' as next month's Brit Awards and will face competition from James Blake, James Morrison, Ed Sheeran and Professor Green.
> Noel Gallagher: 'Modern music is dreadful'
Watch the music video for Noel Gallagher's 'If I Had A Gun' below: