The ZCP car has OEM X pipe w/ cat deletes vs your HFC (marginal difference). It's making similar power because your car has similar mods, except the tune.
Try the new OEM software on your car or a different tune. Results look within reason to me.
M3 Sedan - AW/Black - 6MT - no moonroof - no folding seats - RAC RG63 - clear bra by Omega Werks