The larger sensor makes a world of difference in noise especially. Side by side in low light would be night and day. If you chose to do any enlargements, 11x14 or 16x20, it would be pretty apparent as well. Posting on the internet, not so much.
I don't see any info on any specs of environmental durability. The construction is metal and feels great, I would imagine in a slight rain it would be fine but I can't say for sure. Many professionals are using it as a backup camera or for situations that a traditional camera wouldn't be possible.
