in-ear phones, or canalphones, have better sound quality than standard earphones. This is because of the ability to reduce noise interference from outside.

they usually offer more deep bass too, so you get a really cool, rich sound.
im currently using Philips SHE9500 Canalphones, but they are really average only..you should check out the SONY ones.

headphones im not sure, but i think in-ear phones are better than regular EARphones. But i bet expensive high-end Senheiser Headphones kick everything elses a$$.

Personal opinion counts, but when millions of people use something and say its good, u shld learn to trust them.

for example: millions of people say iPod is good - good interface, good quality, nice click-wheel, nice display.

but personal opinion some people like another brand/model. so which is BETTER? Personal opinion versus Quality.

only really weird people will choose personal opinion OVER quality.