I did the first half of my Instrument rating in a 6-pack, and the second half in the G1000. the only thing i didnt like about this was when it came checkride time, i was expected to know both systems. I took the actual instrument ride in the g1000. I also did my entire CFII in the g1000.
I guess the only real difference in the checkrides is the way the examiner goes about doing partial panel. As said above, make sure you know what instruments/displays you will lose if a certain LRU fails (AHRS, ADC, Etc..)
Partial panel on the g1000 for me on both rides was just the examiner dimming the Primary display to black. I put it in reversionary mode to show i knew an easy fix to it. then he gave me my display back.
On my CFII ride, the examiner actually made me shoot a VOR approach with a piece of paper covering everything except the HSI needle, it was an interesting set up, and it didn't work very well.