makefile, size of an executable, static/dynamic - dynamic

Question

I have a makefile, for a C project with 2 sub-C-files and I can create two exe, one static and one dynamic.
But the static is lighter in space than the dynamic!
The programs can be launched and seems to be the sames
Is it normal?
Thank you very much, I have an exam in 2 days and I hope I will fix that problem :)
Simon
CC = gcc
CFLAGS = -Wall
CFLAGS2 = -shared
CFLAGS3 = -fPIC
LIB_U_CAM_TTL = -l_projet_vision_u_cam_ttl
LIB_SERIAL_LINUX = -l_projet_vision_serial_linux
CHEMIN = -L/usr/local/lib
lib_projet_vision_serial_linux.so: serial_linux.o
$(CC) $(CFLAGS2) $^ -o $#
lib_projet_vision_u_cam_ttl.so: u_cam_ttl.o
$(CC) $(CFLAGS2) $^ -o $#
lib_projet_vision_serial_linux.a : serial_linux.o
ar -rv $# $^
lib_projet_vision_u_cam_ttl.a : u_cam_ttl.o
ar -rv $# $^
projet_vision_dynamic: main_vision.c install
$(CC) $(CFLAGS3) $^ $(CHEMIN) $(LIB_SERIAL_LINUX) $(LIB_U_CAM_TTL) -o $#
projet_vision_static: main_vision.c install
$(CC) $^ $(CHEMIN) $(LIB_SERIAL_LINUX) $(LIB_U_CAM_TTL) -o $#
%.o : %.c
$(CC) $(CFLAGS) -c $< -o $#
install: lib_projet_vision_serial_linux.so lib_projet_vision_serial_linux.a lib_projet_vision_u_cam_ttl.so lib_projet_vision_u_cam_ttl.a
sudo cp -f *.h /usr/local/include/
sudo cp -f *.so /usr/local/lib/
sudo cp -f *.a /usr/local/lib/
sudo cp projet_vision_dynamic /usr/bin/
sudo cp projet_vision_static /usr/bin/
sudo ldconfig
uninstall: clean
sudo rm -f /usr/local/include/serial_linux.h
sudo rm -f /usr/local/include/u_cam_ttl.h
sudo rm -f /usr/local/lib/lib_projet_vision_serial_linux.so
sudo rm -f /usr/local/lib/lib_projet_vision_u_cam_ttl.so
sudo rm -f /usr/local/lib/lib_projet_vision_u_cam_ttl.a
sudo rm -f /usr/local/lib/lib_projet_vison_serial_linux.a
sudo ldconfig
clean:
rm -f *.o *~ *.so *.a
rm -f projet_vision_static projet_vision_dynamic