Can't speak for Euro-ops, but in Australia if you're flying, say piston singles and twins (less than 5700kg MTOW) you'd only generally be tested on the most 'advanced' type. It would then be assumed that you were competent on the simpler type. This would also be dependent on which aircraft was available for you on the day of your line/route check/instrument renewal.
e.g. A few years ago I flew both PA-31's and C402's on RPT ops between Darwin and the Tiwi islands. My route check and Instrument renewal were done on the C402. IMHO, should have been done on the PA31, as that was the more demanding aircraft of the two to fly, especially in the tropics.
(Obviously before you could fly any of these aircraft, including any of their singles such as C206, C182, C210, you'd have to be checked out prior)
DIVOSH!