The filter wrench that is form fitted to the end of the filter, (the cap style), is the easiest, most convenient way to remove them. especially in a tight spot. It must fit precisely, to work. But, when they do they work great.
There are about 20 different ones now, and the only way to know for sure is to take a brand new filter out of the box in the store, and find a wrench that fits it. some fit better than others, so try any that seem to be the right size.
I have most of them now, so I usually have one that fits.
When this fails, I move to the more aggressive crushing type wrenches.