Just because the FT and a VAT CAN be calculated as a percentage of price does not make them equivalent in economic consequence or administration or enforcement.
The Fair Tax IS NOT as VAT in that it is not, repeat NOT levied at each stage of production. It is levied at the point of final sale. The organizations charged with collection are the retail sellers, not the producers.
The Fair Tax is similar to the VAT in economic consequence. It is eligible for full border-adjustment, as is the VAT.
This is the only important point. The Fair Tax and the VAT are equivalent for all intents and purposes to the average person.