To refrain from flaming, your either a total newbie who just learned a lesson (google, musiciansfriend prices, ect.) or a troll. I will assume you are a newb. Squire to fender is as Epiphone is to Gibson. They use cheap hardware and construction is hit or miss. For the price you can usually find a decent one. There are Mexican and American fenders. Americans being top notch, Mexicans being good. P bass vs jazz- different neck (jazz being thin, P being a log), different pickup configuration, different electronics, different sound and feel. There is a huge distain for squire, but you can find some good ones, and they can be a great value. I personally dislike fender/squire in general, probably because everyone else does. I hope that answers your question. Obviously your curious (or a troll), you should go out to some shops and try all four, hell try an American or two.
OP- if you a troll its too bad you cant frap to get off, and have to make people look like idiots behind a computer screen. I'd like to see you on the streets. If you are in fact an ignorant newb, I hope you learned to research first (this ones not hard), then ask questions.
To the rest of you guys- I am 22, drunk, and just got back from a show. Have a little respect for the guy will ya? And to the guy that made the comment about guitar center, ****ing right on man!