Yep, two different animals, the DC-3 and single rec amps.
I had a solo 50 head - which is a single rec like the rectoverb - for a long time, and I still have a rocket 44 head (DC-3 power section, subway series -derived preamp). Both great amps. The recto can chug like nothing else and is like a battle-axe in character, sort of a hybrid somewhere between weapon and instrument. What it cannot do is sing and scream like the DC series does. Of the two, the DC's/Rockets are much more versatile, just as aggressive (in a way very different from the rectos) and have a more beautiful, soaring solo voice with a creamier overall character.
Try both and see what you think. My bet is that you will prefer the rectoverb for your applications, but one never knows....