Could be the boost solenoid valve itself is bad, but another possibility is the wastegate is not fully actuating mechanically. But start with the wastegate units.
A test i have run successfully is to unplug each one, one at a time while leaving the other plugged in and retest .. don't go all ballz deep on boost .. but get enough boost to see if one or the other sounds *radically* different ... (one will be louder than the other by nature of placement.)
then replace the bad unit, buy a spare and cram it in the glove box.
Welcome to the forums!
Also buy a low pressure fuel reply and shove it in the glovebox. you will need it someday .. there cheapish.