It's the exact same thing, as long as you're not paying tax. If you ARE, however (p. 7), the estate and gift taxes are progressive: the first $10K is at 18%, the next $10K is at 20%, and so on up to 45%. So the exemption covers taxes that would be paid a the lower rate. In other words, if you're paying this tax, you're going to be paying it at the higher rate.
So if you go over the $1M limit by $1, you pay tax on that $1 at 41%.
The 6-month deal is very serious. An extra day and you're shafted, and a fiduciary who has failed to protect the family assets should be prepared for a lawsuit.