So I just threw these in winISD, I only entered t/s parameters and skipped EM and Large signal stuff, not sure if the matters. DC might have a little bit more output above 35hz but the gcon and LI can go a bit lower.
gcon is red, LI is blue, DC is black
I used 0.8 cu ft for each and 1000 watts for the spl plot.
spl on 1kw, DC is like 1-2 dB louder over a small range. Not sure if you would hear much of a difference. Other subs can play a bit lower
TS parameters if anyone wants to double check my work