This is a comparative review because my experiences with FP's are limited iin breadth. I've been using them for a little over a year but have only used the above three much.
The TW was the first "good" FP I've used because before that I'd only used a cheap calligraphy pen and a bic XPen. The next pen I got my hands on was the phileas when I gave it to my sister as a wedding present. Later on my brother got one for a birthday present allowing me to play with it some more. Finally I got the VP as a christmas present this year.
TW: I got the black, marbled color which looked slightly gaudy at first but has really grown on me so that now I sometimes find myself just admirinig it. The plastic doesn't feel like anything special but is solid enough to have survived many falls, sometimes onto pavement, with no visible damage. It certainly helps that the walls of the pen are thick. The fine nib that came with the pen had a slight amount of flex but nothing special. The pen has never had any problems with flow, always starting rapidly. The cap is threaded which is sometimes obnoxious when other people try to use my pen and go to yank it off or when they slam the cap back on. The threads have taken an admirable amount of abuse from my friends without breaking. The nib and feed unscrew as one piece allowing me to switch to a broad nib over this past summer. The broad nib is BROAD (~1 mm) and much smoother than the fine nib with all the ink it drops. I hadn't intended on using the broad for evry day writing but it has never been taken out after I inittially screwed it in. With the broad the converter gets emptied so quickly you could almost see the ink level dropping as you write.
Phileas: Slightly cheaper than the TW. The pen looks fine, classic but not so eye-catching. I've used the medium nib only which was about as smooth as the TW broad and smoother than the TW fine. Teensy amount of flex in the pretty nib. Teh biggest fault I had with this was that the plastic of the body which felt weak, and I hate to use this cliche but also cheap. Maybe I just got used to the uber-thick, solid TW plastic but this pen did not feel substantial enough.
VP: AAh, my little black carbonesque VP. It was disappointing that the body isn't actual carbon fiber, just mock-carbon fiber which feels kinda silly but it still looks okay. When the nib is retracted the button sticks out the back so far that it draws too much attention. The nib is Broad but is more like the TW fine which is not to my taste. The filling mechanism is obnoxious because it doesn't hold much ink and you can't see ANYTHING unless you yank out the converter which can risk ink drops all over. The nib is smoother than the phileas but not as smooth as the juicy TW. The clicking mechanism is a durn great idea, which is realy the only reason i use this pen more than the TW. Oh, and ink (noodler's red/black) creeps up around the feed. THE CLIP! almost forgot the clip. the controversial clip is actually a plus for me since it orients you quick. Quick is how i'd summarize this pen.
IN SHORT the TW is my favorite writer because it's the smothest writer and also fulfills my desire for broad, juicy lines (insert comment about my taste in women) but I use the VP because of the quick-clicking. The phileas was okay but didn't feel great.