I wouldnt say it is as cut and dry as mentalcel=fakecel, i think mentalceldom is a grey area. A mentalcel could potentially be good looking and doing well in life, but due to one thing or another, they struggle with getting sex. However, the grey area is that some mentalcels could potentially ascend if they worked at it in ways incels and trucels cannot.
Id say the issue with a mentalcel is often not their appearance, and is instead something that can be mitigated in some way, such as using medication for an anxiety disorder. Mentalcels have a clear path to ascension, assuming the baseline level of physical appearance is met