C182 not quite true.........l believe that the 182 has a 235hp engine so high perf. kicks in. Do both in a 182 rg and get it over with.
Correct, although some instructors are reluctant to do both at the same time. Depends obviously on your experience level. A good one to do the complex in is a 172RG. Has all the required bells and whistles but doesn't need the high-performance endorsement.