Tenchu Kurenai was an orphan as far as its non-Japan release was concerned - Activision took a pass on its NA and EU releases when the game was announced. I am glad Sega didn't do the "let's jack up the difficulty level so renters can't beat it so fast" changes. As far as they're concerned, it's a straight publishing deal. Localized and bam, it's done. They don't own it, so maybe they weren't even allowed to change it in the first place.
As for Famitsu, they know what they are doing. All the game guides published by their editorial staff have been top-notch, complete, and always blows away the competition. I have yet to find a Famitsu guide that is not better compared to the ones for the same game from Softbank or Kadokawa.