Rotel RMB-1095 vs. Parasound HCA 2205AT

Can someone please explain the major *design* differences between these two amps and what the advantages and disaadvantages of each design is? Again, I am not asking about sound and/or sound tendencies of these amps, I merely want to understand the differences in design.

From the specs, it appears the Rotel uses torid transformers and capacitors, and the Parasound looks to be 5 mono-blocks in a box. Is one design better than the other? Thanks!

-Jason