Not as simple as
THE Oregon vs.
THE Granberg - several versions of each. Started a thread on this on '
another' forum with lots of photos, and opinions from a number of users:
http://www.arboristsite.com/community/threads/granberg-file-n-joint-revisited.193630/
Condensed version: High quality plastic does not make one 'bad', nor does all metal make another 'better' - the tool is supposed to
guide you as you file,
not force you into a rigid position. Fine if you don't fight it. Plus, the plastic frames do not crack and break like the ones in some of the older versions of the Granberg jigs. They all work. They will each allow you to get very consistent, very precise edges. Choose one that will make you happy. Or buy one of each, and keep your receipts.
The current version of the
Granberg File-N-Joint (G-106B) is metal, but cheap metal - I had to disassemble the one I bought and polish off all the rough casting edges before using. It works. It is compact in size, compared to other versions. Often sells for around $35 (prices vary).
The current version of the smaller Oregon Sure Sharp (#23820) is similar in size. Uses molded plastic (nylon?) for the top cap and file holders. Often sells for around $23 (prices vary).
The larger Oregon Professional File Guide (#557849) has more metal, but still some plastic on the file holders. It is physically much larger than the other 2. Often sells for around $36 (prices vary).
The STIHL FG-1 looks like the smaller Oregon model, and likely came from the same vendor (used to be Italy, now China). The STIHL FG-2 and FG-3 are NLA, but massive, compared to even the larger Oregon model. Older versions of each are typically available on eBay.
Philbert