TightVNC v Ultra VNC - Which is best?

[Gareth Davies, Aberdeen Internet]

Have been trying TightVNC but having had a quick look at UltraVNC it looks
appealing. Looks like a bit nicer interface and some other advantages such
as chat, and rescaling viewer to fit window. And did I read somewhere that
it's normally faster? (I just need for between Windows PCs). 

Can anyone advise what are the other pros and cons between the two programs
and which is best choice overall. 

Many thanks.