Drywall installation...longer better?
The other factor is this: Have you ever tried to install a 14' sheet of 5/8" or 1/2" onto a ceiling or wall?
Do you have arms like Popeye, or a Back built like Arnold Shwartzenegger's (sp)?
You have to take into consideration the weight of the sheets, their large size, and your ability to.....not only manuever them into place, but also hold that weight up for a period of time, while you are trying to sink enough screws to hold it in place.
You are going to use words that your family shouldn't be hearing. (Unless you use a sheetrock lift)
If you install manually (no lift):
I'd opt to stick with the 12'. It's just a garage and personal office, it's not a central room in your house. Even if your garage is 25' and you use two twelve footers: Filling in the 1' section on each alternating end, actually allows you a lot more ease to installing the longer sheets.
The reason is because you are not wrestling a 4x12 sheet into an exact area down to a fraction of an inch measurement. The last 1' piece, (or whatever short length), allows you to easily measure and fine tune the small section to finish that length of the install.
Example: The pros go and install the full sheets first, alternating the seams by staggering the sheet placement. Then, they go back and install the short little 1' to 4' sections after = Easy and fast installations, and much easier on your back muscles.
Yes, you end up with an extra seam, but remember, it's a garage. Don't break your back, pull your muscles, or wear out a baldspot on your head, trying to hold up a 4' x 14' x 5/8" heavy and large sheet of GWB....just for your car to admire.
- Build Well -