Congrats on the Flair they are clever levers and it looks like you are off to a flying start.
The big differences between the standard Flair range and the bigger brothers include an automatically heated and temperature stable group head, a steam wand and a spring loaded lever as opposed to the Flair or La Pavoni, Strietman etc which are “direct” levers.
The lever on spring loaded machines is pulled down to start pre infusion and then released in the upward direction where the springs do the work that you are required to do with a direct lever, that of applying pressure to extract the espresso.
Worth adding the Nurri Leva S.A. to your list of potential lever machines.