I have been studying up on physical security, and watching a bunch of talks and demonstrations that were filmed at various DEFOCN's. They are depressing.
TL:DR is that neither of those is "secure" to anything more then the most casual smash and grab, homeless guy with a rock type robber. I have managed to take and open one of those PacSafe bags (or one very similar) with my Leatherman. It took me less than 30 sec to cut the cable after a friend bet me. It's a shame RevDisk isn't still around as he always had good ideas.
It seems like if you want anything that would secure* a firearm in a vehicle against a long screwdriver or more complicated attack, you need to spend pretty decent money.
Something like this is still defeatable, but you might actually have a chance of keeping whatever is in it.
*If you aren't really worried about security, but have to conform to some kind of "locked" local law, they work very well
ETA:
Just noticed this on the PacSafe Amazon page:
Included with the travel safe is the pro safe 1000 TSA approved travel lock
So not a lock then.