My guess is that the mixed subs will be problematic. There will most certainly be a latency difference which you may not be able to correct. It's certainly worth trying but be aware that the subs may not fire in phase with each other or your other speakers.

Regards,
Bill

Theater: 861v8+ID41, 218, (2) DSP8KSEs, DSP7200VCSE, (2) DSP5200s, Marantz UD9004, (2) JL Audio F113s, Roon
Whole House: 218s, DSP520s, DSP 320s, Roon
Office: 218, DSP3200s, Roon