Although… having said that, and looked up Oasis in Wikipedia, and following all the links under Music/Bands:
Oasis (1980s band), a short-lived English music group
Oasis (American band), an American rock band active in the 1970s
Oasis (band), an English rock band (1991–2009)
and not being able to even tell which one would be comparing themselves to The Beatles without coming back to this question and searching them to see that Liam Gallagher makes them a band formed in 1991 (whilst the The Beatles were active ), makes me think both that wow I really had no clue who Oasis was – I assumed they must be some band from the 1960’s or 1970’s, and that ya this is an even sillier comparison than I initially thought.
However I did see this related but more intelligible semi-comparison on the wiki page:
“What Oasis has done in Britain, unifying an entire country under the banner of a single pop act, a band could no longer achieve in a country like the US. In Britain the band reigns unchallenged as the most popular act since the Beatles, there is an Oasis CD in roughly one of every three homes there. Last month, the band drew 250,000 people to Knebworth for the biggest outdoor concerts in the country’s history; The group’s battling brothers, Liam and Noel Gallagher, appear as regularly as royalty on tabloid covers.”
— Neil Strauss writing in The New York Times on the group’s escalating popularity (September 1996)[33]
I also listened to the short clip on the site of:
“D’You Know What I Mean?” – The lead single from Be Here Now, “D’You Know What I Mean” became the 12th biggest selling single of 1997 in the UK.”
and if the contest of “success” is about me liking them, Oasis fails big-time. They sound whiny and annoying to me, though I think I just dislike that style of music.