I'm more inclined to believe that one as I do believe Noel had a liking for Nirvana, and given his reaction to Liam describing Kurt Cobain as "a sad c*nt who couldn't handle the fame" during a clash with an MTV executive IIRC where Noel described the Nirvana frontman as the "John Lennon of our generation" I would say he had knowledge and opinions on the band going back to pre-1994.

Nirvana were 1000x better than Oasis, that much is for sure.

Its not a matter of one being better. They were/are both fucking great.

Now it's easy to say that, they went on a high, the band ended still on their golden period, wonder what would have happened if Kurt hadn't shot himself and the band carried on for more years, this is a debate between Nirvana fanboys and Pearl Jam fanboys.

If Liam/Noel had shot himself in 1996, Oasis would be gods too.

Wrong forum.

I'll take 'Definitely Maybe' over 'Nevermind' or 'In Utero' however I think there's a solid case for Nirvana being considered the better of the two bands. Of course there is the advantage/disadvantage (depending on how you look at it) of having less material however if we put that to one side here are 3 major areas I (i.e. me, not you) personally think Nirvana musically outstipped Oasis at. They are all pretty obvious so there are no surprises but it probably helps to explain why you'll likely find 'Nirvana>Oasis' the more popular opinion outside this messageboard.

Sonically Existing Both In & Outside of 'Mainstream' Appeal
Listen to any Nirvana record and you'll find sweet pop songs sat side by side with some really quite aggressive tracks. The band had no hesitation to include noisy feedback guitar solos, weird vocal takes and lyrically some rather dark subjects. Nirvana was a band that easily pushed a more extreme sound than Oasis and this showed in their performances both live and on record. Oasis were a band that took many of the sounds of the most popular British bands of all time, whilst Nirvana by contrast emerged from the underground and took that sound with them (even if Butch Vig did slathered his sheen on them).

Instrumental Accomplishment
Kurt and Noel are well known for being limited guitarists and I'll leave you folk to your own tastes (though personally I rate Kurt a fair bit higher than Noel) but there is no doubt that Krist and Dave had more musical ability than their contemporaries in Oasis. Not only this but they were allowed to pursue this and helped construct the bands songs. This blatantly shows when listening to any Nirvana record. Most Oasis songs sound like a band following Noel's instructions in the studio to jazz up a Noel demo.

Lyrics
Kurt actually enjoyed writing and wrote a lot of poetry which later became Nirvana lyrics. Noel however has stated he never wanted to write lyrics, finding it an arduous task that takes time to fall into place. I think it's obvious to most that apart from a few minor examples most Oasis lyrics are simply competent.

If you're talking about me, then talk to me directly. Come on..

Do you actually like oasis? 

You sound like a pretty casual fan, why did you join this forum if you think 5 out of the 7 Oasis albums made were "basically garbage"?

Just browsing. I also like to browse women's underwear, but it doesn't mean i particularly like wearing them (much).

I like to make myself known.

Last time i was browsing anonymously i ended up doing 6 month stretch in jail for peeping in peoples windows and i don't want to go down that route again.