anti seize

Are they created equal? Whats the difference other than temperature?

No all anti-seize is not created equal. The products with nickel are considerably more money but worth every penny.
http://fcsdchemicalsandlubricants.c... Nickel Anti-Seize Lubricant&category=Greases

No comparison really. Standard anti-seize is only good for around 1,400 to 1,600 degrees. Nickel anti-seize is hi-temp and rated from 2,400 to 2,600 degrees. The nickel anti-seize will withstand the combustion chamber temps if you are using it on your 4.6 spark plug grounding shields, the standard parts store stuff will burn off quickly.

Motorcraft XL-2

It's around $25 for an 8oz bottle that will last you probably 10 years.

We're not exactly talking about a fortune.