um, well they r both amazing bands so this is a pretty hard question. but they r both really differnent, so they r both better in different ways. linkin park's Musica and lyrics r really good and i think chad is a really good singer. both bands work really hard on their Musica and chad kroeger created his own record label called 604 records, and mike created fort minor. so both bands have had their own success, but i really can't say which one is better because both bands r my idols, and it just wouldn't be fair. sorry.
They're both awesome bands with different sounds. Linkin Park has più of a hard rock sound and songs with lyrics with deep and sad meanings. Nickleback has più of a softer rock sound and songs with lyics that are inspirational o about Amore and relationships.
They're both pretty good bands but I don't know, I can be biased because Linkin Park has been my all-time preferito band. The reason I think LP is better is because there is so much going on in there music. There's Mike rapping and Joe Hahn with his mixing skills. Then there's Chester with his soft vocals and screaming... and Rob with his drumming and Brad and Phoenix with their guitaring... Sorry, back to the point: LP mixes a bit of everything into their songs. There's hip-hop beats, there's rap and there's metal. There's some soft rock too. Everything they do, they nail it and it always sounds good. So for me, it's Linkin Park all the way. =)