An assessment of a candidate is looking at basic skills, SA, and the ability to improve where there is an obvious issue. To transition from a B7XX to an A3XX takes a short discussion on what the SSC is doing, and if the auto thrust is to be used, which would be slightly unfair, then how that functions. Otherwise, they all fly the same. They also fly more or less like a Cessna 310. They are vastly less interesting than any Lear, particularly 24's, they rotate without the wackiness of a Westwind. The instruments are more or less the same. This also applies for an MD11, B717, MD80, FK100, etc. They are all better than link trainers, and that is still a reasonable method of assessing whether a person can comprehend instrument displays and manipulate a control system to achieve a semblance of the desired outcome, and whether basic CRM skills exist. If you happen to know the Smiths or Honeywell FMC, FMGCS, FCP etc, then all the better, but it is not the primary point of interest. Having said all that, transitioning routinely from a high inertia aircraft B777/B747/A340 etc back to low inertia plane, A320/B737 does end up with a period of learning on glideslope maintenance, which is still not very long to sort out
Good luck with whatever you drive. In the end it is not what you are flying, or even where you go, it is who you are with that is memorable.