First off ignore the above post. Some people have a great need to give Homo sapiens a bad name.
As to your questions.
Snus is basically a moist
tobacco. Both loose and original portions are on the moist side. Whites are dryer. The basic difference is that the taste and nicotine of whites comes on a bit slower, but last longer.
Nether one is right or wrong. It's just personal taste. If you don't have massive nicotine needs there is no better place to start then with mini whites.
This would be a good start for sweet mini whites
General mint mini
All of the Discreet products (from what I've heard. I haven't tried them as of yet)
Though not my favorites, and to expensive for what you get, the camel SNUS (mellow and frost) are with out a doubt on the sweet side.
Besides those you would likely want give the Mocca and Catch products a try. Though some are not quite as sweet as the above you may end up liking them more then you thought you would. Snus can be a bit of an acquired taste. If you don't like something on the first go round, put it in the fridge and you may have a different opinion when you try it again in a few days.