Does anyone knows what is the diference between SolidWorks SP1.0, SP2.0, SP4.o and so on?

Each later service pack addresses problems found in earlier service packs.

actually the latest service pack include the solution for the all problems mentioned by the consumer and the addins as well as updates like better rendering ,new commands , better working etc.
in addition to above the price s also higher :-)

So each later pack is better than earlier packs?

Thanks guys :)

Thank you @Aqil Ghaffar