I can't speak of WCM's carpets. I can speak of both the stock an
SewFine's....

The stock carpet is made up of many pieces. The largest single piece is
underneath your feet up front. It is the section where your feet are
for both front seats, and the middle section between the seats back to
the drop off.

A separate piece makes up the area in front of the shifter (on the
wall).

Another separate piece is underneath the drop off in the center section
(it's only 1 inch tall about about 14-16 inches wide). The wheel wells
are separate pieces that goes from the center section up and around the
front.

The final section(s) are those that cover the back side of the wheel
wells. (If I'm remembering right, this part includes the section
closest to the door where the seat belt bolts in.)
==========================
Sewfine's install uses different pieces. For example the small 1" tall
section at the drop off for the center aisle is actually part of the
center section on Sewfine's kit. Sewfine also has carpet that comes up
and covers the battery compartment(s). In SewFine's install the section
under your feet is separate for driver and passenger (and separate from
the center section).

Sewfine also tends to have larger edge wrapping than the stock carpet,
which may or may not be objectionable to you.