They don't want a pre lci, hence the comment.
Yep, they're the differences. March 07 was the changeover in manufacturing to LCI models. You can get lci with hydraulics (better 😁), not sure how common it is, my lci E87 had it.
Interior is door cards, they're full leather rather than knobby plastic with leather inserts. Updated iDrive in newer cars. Instrument cluster has an oil temp gauge added.
LCI cars have the Black top engine vs silvertop in pre-lci(is quoted in some places as being 190kw vs 195kw silvertop, not really noticeable 🤷♂️). Blacktop was changed a bit to be more fuel efficient. Valve cover is made of a different material iirc and some other changes.
Rear light design is different. Lci definitely looks more modern from the rear. All these things can be swapped onto a pre-lci , door cards and lights being most common and relatively simple from what the Internet says.
Pretty sure some weak points or known issues were changed too. I've not seen a definitive list to link, this is mostly from bits I've read on various forums/groups. Babybmw or the 130i Owners group may have a write up on it.
I have two 130i(used to be three, could shortly be one), an lci E81 and a pre lci E87.