Is 1.6.2.10 the latest Firmware version for the "normal" ordinary OSMO ? Sorry, I am a bit confused after all the news with Raw and x5, Livestream etc.

Yes.
For normal Osmo, that is, "the X3+Osmo handle", the latest firmware is v1.6.2.10.
When the X5 camera is mounted on the Osmo handle via the X5 adaptor, we call it "the Osmo Pro".
When the X5R camera is mounted on the Osmo handle via the X5 adaptor, we call it "the Osmo RAW".

Thanks.