Decided to open these two up as well. Not much difference in specs in the manual but the boards look close to the same as well. Other than the 2050h being stamped 2030 not much difference to me.

Specs per the manual........

50 x 2 @ 4 ohms
80 x 2 @ 2 ohms
160 x 1 @ 4 ohms
THD: less than 0.01%
S/N: 100db
Damping factor: 100
Fuse rating: 10A
Measurements: 6.5x6.3x1.9in
Weight: 4lbs