Which Strahd stat block would you use in CoS?

There is now three official strahd stat blocks. In the Curse of Strahd, which one would you use against the players? Feel free to say why you would choose one over the other.

The one featured in the adventure

If I was using 2014, probably the EoR one. 

2024, definitely Ravenloft

Depends on what rule set you’re using. If your players are using 5e characters then use the Curse of Strahd version, if they’re using 5.5e then use the Ravenloft version

Better answer is use the version you have access to. No point buying a new book just to get a new stat block if you’ve already got one that can do the job

The module isn't super balanced for the specific power level of Strahd anyway. The module version of Strahd has a completely broken lair action (pro tip: never create a monster with both regeneration and the ability to walk through walls) that as a DM you have to just decide not to abuse, and a bunch of fairly pointless spells, but is otherwise probably weaker than the others unless you customize his spell list (which, since he's a 2014 spellcaster, is assumed a standard change).