Hi Juan, okay so this question ha ben asked a few times so i would suggest using the search function for greater detail and tons of posts in this regard.
The quickest, short and sweet answer:
2005 mid-2008 (Pre-LCi):
110kw & 125kw engines
Packages avail. were Exclusive, Sport, M-Sport & Sport Edition Individual
late 2008 - 2012 (LCi)
130kw & 135kw engines
Packages avail. were Exclusive, Innovations, Individual, M-Sport & Dynamic (Limited)
Differences between the 2 more over:
LCi lost some standard nice to haves from Pre-LCi eg.
A second ashtray & lighter in the rear
Pop-out Cupholders in rear arm rest
Lights for vanity mirrors
Netting on front seat backrests
Nicer looking Start/stop button
LCi has the silver trims on the light button & radio rotary knobs
Better suspension and wider rear track diameter
Headlight design and functions with LEDs
Rear cluster design and LEDs
Rear-view mirror designs changed and the LCi got standard exterior mirrors and not the tinted blue ones any longer
All LCi's came out with exhaust finishings in matt silver...excluding 320d & 330d.
LCi interior had a slightly different design and stitching to the seats.
Between 2008 & 2009, a lot of pre-facelift cars would have the Lci engines in them and the Lci interior bits as well e.g. My 2008 Ind. Sport Edition had the LCi interior bits & the 320i engine with 125w instead of 115w (it had a factory standard upgraded exhaust & DP) but i found out this wasn't standard on the Lci 320i so not to sure about that.
Anything else anyone can add to the above? Im a bit tired so could be missing few things...
hope this helps bud