Can I compare results from 5 point likert scale to results from 4 point likert scale?

#1
Can I compare mean (descriptive analysis) from 5 point likert scale to a mean of 4 point likert scale?
Results from 5 point likert scale: M: 3.34 (SD: .80) Results from 4 point likert scale: M: 2.18 (SD .44)
I want to compare these results, is that possible?
Thanks in advance,
 
#2
No, I don't think you can do such a comparision (unless you are willing to do some very strong assumptions about scaling both scales to the same scale).