What are the differences between difficulties in Legend of Grimrock

Where a switch type appears on a wall is variable, so while the screenshots below circle what the switch looks like, it doesn't mean you can always look at exactly that part of the wall to see it.

Here are the hidden switch types I've seen.

Also, I have found secrets by doing the following:

• Placing torches in sconces
• Removing torches from sconces
• Finding pressure plates on the floors (which have always been very obvious)
• Placing desired item types in alcoves (such as putting a weapon in the alcove outside the room that says "no weapons allowed")
• Slicing tapestries hanging on walls to cut them down and reveal switches behind them.

It completely depends on the enemies you're fighting and the damage their attacks do.

If you are fighting an ogre, and they will hit you on average for 70 HP damage, and you have 30 protection, you'll only take 40 damage. If you have 50 evasion, let's say for argument's sake that it's a straight-up percentage of hits dodged, you'll take 35 HP damage on average (i.e. 1 out of every 2 70 HP hits.)

If you're only fighting spiders, and they hit ~15 HP, if you have 15+ protection you won't take any hits, but your evasion points will be worth less.

So, basically, the bigger the enemy, the more worthwhile evasion is. ... but watch out when you get hit.