The main diference is the purpose of research. If you want to answer the questions that are started from " who" " how many" " how often" etc. You should use a qulitative researces. You collect the information and then explain it via statistic methods. You receive a result in view of graphic or diagramms ( for example you col know the share of the market for your product) . The quantative researches help you to answer the question " why"( why do the people don't buy your product?) ( may be it's happened because they don't like the colour of box) . You can't know it by qualitative researces. But in focus-group or during the long chat the interviewer can know it.

Есть мнение,что деньги - это увеличительное стекло. Будучи сами по себе нейтральными , они усугубляют то , что имеется, придают размах. Т.е все зависит от их владельца, доброму они позволят делать больше добра , в то время как злой будет творить злодеяния в больших масштабах:)

As told one of russian actresses if you want to lose a weigth you can eat everything you want and when you want. But you should be naked and stay before a mirror when you eat;)

I use Iphone 3G black and i am not going to change it in nearest future. I like it very much;) 

I eat a chokolate or ice-cream, read sad book or watch sad movie and understand that my problem is really easier than some other people. After that i go to sleep.