Difference between UJT and FET

the differences between UJT and FET are :-

1. structural :- a. there is only one p-channel in the UJT where as two in JFET

b. the p-channel of UJT is more highly doped when compared to p-channel in JFET

2. functional :- UJT always works in forward biased condition (gate is forward biased) where as JFET always work in rverse bias condition (gate is reverse biased)