What is Pathfinder?
Pathfinder is a Role Playing game that is based on the Dungeons and Dragons 3.5 edition SRD, but it boasts some improvements to the rules. It has quickly become one of the most popular role-playing games around, rivaling even Wizards of the Coast's Dungeons and Dragons.
Pathfinder is for all intents and purposes, the continuation to 3.5 that die-hard fans had hoped 4th edition would be. Unfortunately for those fans, 4th edition was really a whole other game entirely. Fortunately, Pathfinder picked up where 3.5 left off.
Like most other role-playing games, Pathfinder requires a certain combination of things to play, dice, and character sheets.
Pathfinder Character Sheets
A character sheet is necessary to record all the scores your character has for abilities, skills, feats, and everything else that makes this character playable. Until you are completely familiar with the game and all if it's mechanics, and would be able to spot features that might be missing from a custom character sheet, your best bet would be to stick with the official Pathfinder character sheets that are produced by the publishers of Pathfinder, Piazo Publishing.
Aside from being just a record sheet though, a character sheet can be a very personal thing. There is no such thing as "one size fits all" when it comes to character sheets, (or most articles of clothing that are labeled as such… believe me…). While one person might like one layout, someone else might like another. so naturally there are many options give Pathfinder's current popularity.
Comparing Pathfinder Character Sheets
As I eluded to in the previous paragraph, I am partial to official character sheets. If a character sheet is produced by the same company that published the source books than it's a good bet that they didn't leave anything out by accident.
Also you can typically follow along on the character sheet as you read through the source books, and you'll find that the information you're looking for to fill out the character sheet is in the same order in the source books. In other words, if the stats are listed on the character sheet as STR, DEX, CON, INT, WIS, CHR, then more than likely, they're listed in that order in the book.
This can prevent you from looking up multiple values, and writing them down in the order you found them in the book, only to find (or worse, NOT find) that the character sheet had a couple of stats flipped, and now you've got a strength bonus in your intelligence bonus slot. It may seem like a little thing, but it has happened to me before. It's the little things that make me happy.