It is a lot easier to fly a G1000 IFR. By that I mean, you can keep altitude within 20 feet and heading within 1-2 degrees as the norm. No way can you do that with a G530 and conventional instruments.
I can as well, as can most of the folk I fly with. The width of the zero is the tolerance and abuse and witty comments fly if you step outside it. Same with heading. All that on the standard 6 and a crappy trimble.
In 10 years I have never had a instrument failure of the standard 6 or them to give me spurious readings. Which i really wish was the same on the EFIS aircraft I fly which deals out comparator errors, databus errors, signal generator failures, screens go blank after lightening strikes and all manner of other things to piss you off. Nearly all of which self heal after turning the master switch off and on to reboot the lot.