They are not similar because $\displaystyle{\overline{{{F}{D}}}}\usepackage{cmbright}\Huge\$ is 6 more than $\displaystyle{\overline{{{C}{A}}}}\usepackage{cmbright}\Huge\$ , while $\displaystyle{\overline{{{E}{F}}}}\usepackage{cmbright}\Huge\$ is 8 more than $\displaystyle{\overline{{{B}{C}}}}\usepackage{cmbright}\Huge\$ .