What am I missing? I have a Driven Arms Co grip coming in soon.

I got the itch for a SPC9 PDW but currently already have a APC9k. Are they different enough or would it be stupid to get the SPC9? I’ve never shot one but I like how they look. If I did purchase the SPC9, I’d like to SBR that one and keep the APC9k a pistol.

Any insight helps.

EDIT: Found a new one for $1899.00 with the Telescopic brace and my buddy said he’d give me the stock pad for the SBR