Black & White Films for Landscapes - Fast or Slow?

I'm a big fan of 400 speed mono films but sometimes I hanker for a slower material in the belief that it will give me something extra. In this video I put my standard HP5+ up against its slower sibling Pan F+, which one will I prefer? Camera Equipment: Bronica SQAi Vlogging Equipment: External shots - GoPro Hero 7 Black Internal shots - Panasonic G9 with 12-35 f/2.8