Has anyone ever figured out what the differences are between these 2? Can one be crossed over lower than the other? Does one work better with the 2450SL than the other?

STX 815 part # - 5006219
HF used - 2432H
X-Over - 1.8kHz
Current $ - 44.00US
Also used in - Unknown


STX825 part # - 5006815
HF used - 2453H
X-Over - 1.3kHz
Current $ - 60.00US
Also used in - SRX812P, SRX815P, VTX-F12, VTX-F15