Its all true, in addition digital version have some unjamming changes during overwatch.
And this game has some big differences in the game mechanic compare to board game.
I agree that there are certainly some differences in terms of few mechanics but for the most part the rules are almost all the same.
I'd say the biggest differences are as follows.
1. Space Marines can't interrupt the Genestealers turn with command points. Instead left over command points will be automatically spent on unjamming.
2. To make up for the inability to interrupt, Space Marines can split up their actions. Meaning you can spend 2 activation points on 1 Space Marine, take some actions with another, and then come back to that first Space Marine and finish up.
3. Heavy Flamer doesn't just cover a "tile" but instead has variable ranges that can be adjusted by move the cursor around after selecting the action.
Granted some of those may seem pretty game changing at first, but they're actually pretty well balanced in practice. Aside from those rules changes literally everything else is just a 3D version of Space Hulk 3rd Ed.