Advice Please: Difference between DLP-SU CM and DLP-SU DM

Afternoon party people

I am wondering if anyone knows the difference in how these two variants operate

I am working on a possession-heavy 2-3-2-3 (in possession) and wondering if a DLP-SU (CM) would push up high enough to operate in the in-possession AM

Potential tactic:
GK: SW SU
RB: IWB SU
RCB: BPD ST
LCB: BPD CO
LB: IWB SU
DM: Either DM SU or DLP DE
RCM: AP SU/ATT
LCM: DLP SU
RW: WING att
LW: Wing att
ST: AF-Att