benzaldehyde a.k.a 'artificial essential almond oil' is two of the same things. So, if that is the case then what makes it 'artificial'? Would it be the same as bitter almond oil extract with the hydrocyanic acid removed?
The 'artificial' label is due to the benzaldehyde being produced synthetically, as this is way cheaper than extracting it from almonds.
'Genuine' oil of bitter almonds is 81-93% benzaldehyde, the rest being hydrocyanic acid (<5%) and other miscellaneous compounds which varies with source and method of isolation: http://www.hort.purdue.edu/newcrop/duke_energy/Prunus_dulcis.html (http://www.hort.purdue.edu/newcrop/duke_energy/Prunus_dulcis.html)
The difference between artificial and genuine almond oil is similar to the difference between aqueous ethanol and vodka.