Female version of Westlife, don't make me ANGRY!
Westlife - dull, covers, stools, predictable
Girls Aloud - creative pop, fun, great energy,
Do your self a favour and listen to Girls Aloud on Spotify.
How the heck can you make that comparison,im sure you're just trying to be ironic!.

Sorry but Girls Aloud are above Sugababes now and have been for a fair few years now. Maybe in the earlier years they where bigger but in fewer years Girls Aloud have sold almost evenly. I think Girls Aloud personally are the best girl group the UK has ever had. There albums are amazing. You have a line up of the perfect pop group - everyone's so different and so similar and everyone seems to identify with a member for what ever reason. Sugababes have had some hits that i admit are good and some damn good albums, but currently GA are bigger than Sugababes and have been since early 2008.
Just to reconfirm because everyone keeps confusing it.
Charts & Sales is the same thing.
No is denying Spice Girls are heads and shoulders above anyone else past present or future sales wise, but the pointi was making was that in my opinion the Spice Girls albums where extremely weak bar the singles. The singles where very good yes, but the albums to me felt very filler. In comparison, Girls Aloud have had a knack of really creative inventive pop music that surprises you, is fun, different than anything else, sparked and oozing with personality and so relatable. I think Girls Aloud are quite simply with S Club 7 the best of the best of british pop groups.
Quality wise FOR ME- Girls Aloud
Sales wise- it's undeniable Spice Girls.
To Summarise, as everyone is going on a tangent!
Sales wise
1. Spice Girls (sold 8x anyone else!)
2. Sugababes (GA will easily overtake later this year,more releases, more active years)
3. Girls Aloud (just missing out by a few 100k)
4. Atomic Kitten (sold well for a few years)
5. All Saints (They had big potential, they just ruined it for themselves)
6. The Saturdays (Up and coming, but seem to have a problem selling albums
Quality wise in my own opinion
1. Girls Aloud - flawless albums and singles collection
2. Sugababes - a few turds on the way but generally good
3. Spice Girls - amazing singles collection, meh albums
4. The Saturdays - despite no big success a stomper of a hits collection and some decent albums
5. Atomic Kitten - they had some good songs, but they had alot of filler on their albums
6. All Saints - Credit for songwriting and being different, but not enough good stuff for me bar a few good singles.
If i was buying the records....I'd get the hits collections for All siants, atomic kitten, the sats and Spice.I'd get Sweet 7, catfights, change, taller in more ways and three - i'd snub the first two way too much filler and for Girls Aloud i'd buy every album because truly every album is good.
Why doesn't everyone else do it the same. No one seems to agree and this isn't heading anywhere. We area biased of our own opinions. There's a difference what we cannot deny sales where Spice prevails, but for me quality is with GA.