Yes, they are interchangeable... and it is very wise to always carry a backup! I always remind gigging musicians to keep a spare in that utility pouch on their keyboard bag.
The PA150B is a “universal” power supply... it can handle 100-240V ... how that works is you swap out the ‘plug section’ which actually connects to the wall for the appropriate connector. You’ll notice on the 150B you can remove/separate the plug from the adapter section.
Regular PA150 are voltage specific. Just simply get the PA150 with the plug section rated for your Voltage (typically, that is what you’ll find wherever you live).
Just so you know...
Products that specify PA150, must use PA150.
A product rated to use a PA130, can use a PA150. Never, ever the other way ‘round.
A product will not draw more current than it needs.
It’s the current (Amperes) that is important here. Matching the Voltage, everyone knows to do that, but if your power supply cannot supply the Amps (current or flow) necessary, you have a ‘hungry’ product, not getting enough fuel for it to do its thing properly. This is when bad things like overheating and worse can happen. Smoke appears somewhere...