Walther LG400 Monotec vs LG400 Monotec Expert

[kolchak]

Hi all,
bit of a novice and was wondering what were the key differences between the LG400 Monotec and the Monotec Expert. Documentation on the web is a little unreliable with a number of sites just copying and pasting. I couldn't see the Expert version of the Monotec on the manufacturer website. I understand that there are electronic and mechanical trigger options but seems like Expert implies more than that.
Many thanks

[KabalMSU]

The rear stock of Expert can't be shifted to the side.

[Shooterer]

Typically the different model are in the stock adjustability and upgraded rear sights.

[kolchak]

Thanks guys