```python
from pyscf import gto, scf, cc, pbc
from pyscf.pbc import gto as pbcgto, scf as pbcscf, cc as pbccc

# Define a molecule
mol = gto.M(atom='H 0 0 0; F 0 0 1.1', basis='ccpvdz')

# Perform a molecular Hartree-Fock calculation
mf_mol = scf.RHF(mol).run()

# Perform a molecular CCSD calculation at the Gamma point
ccsd_mol = cc.CCSD(mf_mol).run()

# Define a supercell with replicated units for k-point sampling
cell = pbcgto.Cell()
cell.atom = 'H 0 0 0; F 0 0 1.1'
cell.a = [[4.0, 0.0, 0.0],
          [0.0, 4.0, 0.0],
          [0.0, 0.0, 4.0]]
cell.basis = 'gth-dzvp'
cell.pseudo = 'gth-pade'
cell.verbose = 5
cell.build()

# Perform a mean-field calculation with k-point sampling
kpts = cell.make_kpts([2,2,2])
mf_cell = pbcscf.KRHF(cell, kpts=kpts).run()

# Perform a CCSD calculation for the supercell at the Gamma point
ccsd_cell_gamma = pbccc.KCCSD(mf_cell, kpts=[mf_cell.kpts[0]]).run()

# Perform a CCSD calculation with k-point sampling
ccsd_cell_kpts = pbccc.KCCSD(mf_cell).run()

# Perform IP-EOMCCSD calculations
ip_eomccsd_mol = ccsd_mol.ipccsd(nroots=1)
ip_eomccsd_cell_gamma = ccsd_cell_gamma.ipccsd(nroots=1)
ip_eomccsd_cell_kpts = ccsd_cell_kpts.ipccsd(nroots=1)

# Perform EA-EOMCCSD calculations
ea_eomccsd_mol = ccsd_mol.eaccsd(nroots=1)
ea_eomccsd_cell_gamma = ccsd_cell_gamma.eaccsd(nroots=1)
ea_eomccsd_cell_kpts = ccsd_cell_kpts.eaccsd(nroots=1)

# Calculate differences
diff_mean_field = mf_cell.e_tot - mf_mol.e_tot
diff_ccsd = ccsd_cell_kpts.e_tot - ccsd_mol.e_tot
diff_ip_eomccsd = ip_eomccsd_cell_kpts[0] - ip_eomccsd_mol[0]
diff_ea_eomccsd = ea_eomccsd_cell_kpts[0] - ea_eomccsd_mol[0]

# Print differences
print(f"Difference in mean-field energy: {diff_mean_field}")
print(f"Difference in CCSD energy: {diff_ccsd}")
print(f"Difference in IP-EOMCCSD energy: {diff_ip_eomccsd}")
print(f"Difference in EA-EOMCCSD energy: {diff_ea_eomccsd}")
```