I was going to suggest this, do the test again when the engine is hot.
Get someone to hold the throttle wide open and crank the engine, while you watch how quickly the pressure increases.
The pressure should build up quickly, and there should be no more than 1 bar(about 13.5 psi) between cylinders.
You do not need to do a wet test unless there is a problem with the dry test.
Let me know the results.