The attachment areas of Full and Lite mode are almost equal (because of the FF3 issue). Anyway, for the users who are allowed to switch between Full and Lite the areas do not look equal.
Full mode
input field (id=fileInput0) size=30
select field (id=SelID) width=300px
Lite mode
input field (id=e-$new-0-attachmentsarea-newattach-0) size=99
select field (id=e-$new-0-attachmentsarea-fileselectionlist) width=100%
Just started to test iNotes 8.5. The question is good and actually you run through open doors in my opinion. I will post a screenshot showing two differences which should also be taken care of. But to answer the question first: yes, they should look the same. The funcionality may not reduce speed in Lite Mode cause that is what it is for, low bandwidth. The Full mode will be sooner or later the new Lite Mode, so there will be only Full Mode and Ultralite Mode. But for now, the performance of the Lite Mode is important and must rock.
The two differences:
New message in Full mode (Tab title is Message)
New message in Lite mode (Tab title is New Message)
Look at the Buttons (To,SendTo,BCC). They should look like in Full Mode.