It depends on your reel and rod setup.
Alvey reels have a large diameter, therefore require a large stripper guide.
Threadlines are similar requiring a large diameter stripper, but not as big as an alvey.
Baitcasters are in the category of not needing large guides as the point of which the line leaves the reel is close to the rod.
All you have to do is think of how the line comes off the reel in the casting position.
All....IMO.... and as far as I know.
Phill