No easy way to tell other than looking through enough reviews, or any obvious flimsiness in the construction. We recently tried some tilting brackets from another supplier that looked perfectly fine, but when actually hung on the wall the TV would always drop to the most tilted-down position, no matter how tight the knobs were.
On most brackets you should be able to shift the TV over that much using the swing arms and still have enough to pull it out the 10-12".
As long as it specifically says it can handle 24" on center stud spacing, it should be fine. There's a lot of brackets that are literally 24" wide which would require a bit of creativity to mount.