The thing is: it's not manufacturing node. Apple used TSMC N3B for the M3 and is now featuring N3E. Lunar Lake uses N3B, while the X Elite uses N4P.
It's also not RAM. All of the mentioned chip families use RAM chips right next to the SoC die, interconnecting with either LPDDR5 (M3) or LPDDR5X (M4, Lunar Lake, X Elite).
It's very obviously the core design.
