You should be able to get most of the layouts on here in a 1590B, but it can be a tight squeeze sometimes. The 125B isn't that much bigger when you just look at the dimensions, but it feels a lot bigger when you're building in it. Being able to put sockets comfortably over pots is a real bonus and the extra depth means you could probably even put the board over the stomp switch if you needed to.
I like both but the 125B is definitely nicer for some bigger circuits.