Just to give a refresher of both version's general appearances in GUIs/playerlist, view here at imgur
http://imgur.com/yCzqQyb,bM1m1Ny,gvc...um0AyJ,YptWgzG
Personally, v5 handled it better with using the GUIs for simple windows like "Connecting to Server" with the default font, but the font in v6 is just ghastly to read, makes me feel like I'm being scolded at just by looking at it.
I also like the appearance of the playerlist window over the current, makes it look too busy with the blue and bulbous scrollbars, which are fine for scripted window boxes. (My opinion)