Tomb of Horrors 1E, Can I use Yawning Portal map?

Howdy, Quick question; I'm running a 1E game of Tomb of Horrors, and just curious if the Premium Yawning Portal version is close enough to the original that I can use the map. I can make my own, but it sure is nice to have purty versions. Thanks for help, Scott
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As far as I can tell, it's identical. If you'd like to take a look for yourself, I'd be happy to invite you to game.