The vanilla guide is much larger as a file (as it contains graphics), but also has more pages than the EE guide. One would expect the EE guide to be larger (more quests).
So which one is better, more complete? Thanks!

Neither. Both are inaccurate, though the smaller EE one seems to be less so. The original one is full of information that's outdated and/or just plain wrong. The EE one seems to have a few smaller mistakes, and it's less in-depth than the original, but I'd trust it more.

Thanks, much appreciated! Will use the EE one.

You can always combine the EE guide with the witcher-wiki ones. Each one of them contains things and secrets the other one does not.