It is not as obvious which way you need to go with the platforms in Barnabus' cave compared to Maxos temple (though still relatively straightforward), but the jumping itself isn't any harder. There is lava in part of that section of Barnabus' cave, though, so a missed jump may result in a reload rather than restarting (you'd likely be saving periodically anyway, so you could reload without having to redo many of the jumps).
You can avoid that section if you wish, though would miss the relevant quest.
Playing on an Xbox I didn't find the jumping very difficult, though it was a little tricky in a couple places. Normally I don't care for jumping onto moving platforms, and probably would have had a much more difficult time on PC with a mouse and keyboard (playing Psychonauts on PC I did much better with a gamepad than keyboard).
