------------- normal 3T ---------------

yosys> stat -liberty ./nem_liberty/nem_basic_yosys.lib

14. Printing statistics.

=== s27_nem ===

   Number of wires:                 21
   Number of wire bits:             21
   Number of public wires:          12
   Number of public wire bits:      12
   Number of ports:                  6
   Number of port bits:              6
   Number of memories:               0
   Number of memory bits:            0
   Number of processes:              0
   Number of cells:                 16
     $scopeinfo                      3
     D_FF                            3
     and_3T                          1
     inv_3T                          3
     nand_3T                         4
     nor_3T                          2

   Area for cell type $scopeinfo is unknown!

   Chip area for module '\s27_nem': 84552.000000
     of which used for sequential elements: 60168.000000 (71.16%)

------------- 4T ---------------

yosys> stat -liberty ./nem_liberty/nem_basic_yosys_extended.lib

14. Printing statistics.

=== s27_nem ===

   Number of wires:                 20
   Number of wire bits:             20
   Number of public wires:          12
   Number of public wire bits:      12
   Number of ports:                  6
   Number of port bits:              6
   Number of memories:               0
   Number of memory bits:            0
   Number of processes:              0
   Number of cells:                 15
     $scopeinfo                      3
     D_FF                            3
     and_4T                          2
     and_not_4T                      2
     inv_3T                          2
     or_4T                           2
     or_not_4T                       1

   Area for cell type $scopeinfo is unknown!

   Chip area for module '\s27_nem': 71504.000000
     of which used for sequential elements: 60168.000000 (84.15%)

------------- Muxig ---------------
------------- Stats ---------------
Area 3T: 84552.000000
Area 4T: 71504.000000
Ratio 4T->3T: .84568076449995269183%
Area MUX: 
Ratio MUX->3T: %