I think the X215Pro could be an option but just a couple of observations...
X215P - While the power comes out the side (good) it is too short to strap to the frame and the first time you lose the battery it will likely break the PDB where the power cable gets yanked by battery flying off (bad)
DM220 - Has enough length on the power cable coming out of the back to zip tie it with some slack to the base of the arm so if the battery ejects it can't destroy your connection to the PDB (Better)
X215P - The shape, while cool, just completely makes an action camera mount almost impossible (bad)
DM220 - Is made to hold an action cam one day if you so choose and you can adjust the fixed angle with a little foam shim (better)
X215P - Bullet prop nuts (bad)
DM220 - Standard prop nuts (better)
X215P - AU$233 and Frsky or NO RX only, and it is the "new hot lick" clone of the GEPRC Leopard (seems like it would be a little more and it is NOT even on sale)
DM220 - AU$233 and can be gotten with your choice of 2 different Flysky RX, it IS ON SALE and STILL is as much as the X215P which tells me that this is the better quad for the money
IMHO Brother...