Vinyl is the original high definition format. Digital symply doesn't have the dynamic range that a record does. Digital is a jagged edge that approximates an analog waveform. It doesn't have the secondary harmonics that a real analog recording has.
Its the same difference between a poor quality MP3 recording and a CD, ecxept a record doesn't have a sampling rate, its a real analog waveform.
Biju: I think the choice of turntable wil not be as much difference as the cart you use on it, and those 2 not as signifigant as what phono pre you use. A $20 garage sale turntable and a tubed phono stage will kill $1000 table/cart combo fed into a solid state pre.
Remastered usually means ruined. In most cases there is less background noise, but all dynamics are gone because of the compression used to supress noise. The wort 2 examples I can think of are Billy Joel - Glass Houses, and Jethro Tull - Aqualung. probably the worst 2 CD's ever made vs the record.
This link may help you understand.
http://www.xanga.com/sonickGQ/501878133/item.html
John C.