Revolutioner vs Revolutionist: which is better?

Both words can be found in a dictionary and have the same meaning. My question is: is any one better than the other in any way? Is one more fitting in certain scenarios?

I think revolutionist sounds more natural but I'm not sure. I've been living in Eastern USA for about 5 years so could it be that revolutionist is just more common in my area?

If what you are looking for is this sentence "he was a great revolutionist" then the correct way of saying it would be: he was a great revolutionary; " Che Guevara was a great revolutionary."

Revolutionary: a person who either actively participates in, or advocates revolution. Also, when used as an adjective, the term revolutionary refers to something that has a major, sudden impact on society or on some aspect of human endeavor.

We almost always use revolutionary (versus revolutionist or revolutioner, etc.) to name (noun) or describe (adjective) someone who caused, led, supported, or was important to a revolution (major and fundamental change).

From the Corpus of Contemporary American English (COCA):

And here's a young girl on a horse who was a great revolutionary heroine, so you should by all means stop and see that one.

Date: 1994 (19940703); Title: Authors Remember American Women's Historical Landmarks; Source: NPR_Weekend.
Davies, Mark. 2008- The Corpus of Contemporary American English: 450 million words, 1990-present. Available online at http://corpus.byu.edu/coca/.

The Christian ministry has been located on the corridor for 10 years. "King was such a revolutionist," Thomas said. " That's what we're trying to do.

Date: 2000 (20000113); Publication information: CityLife Atlanta (Extra); Title: A stroll down MLK Drive;The road named for the civil rights leader tells a story as it meanders through town; Author: S.A. Reid, Staff; Source: Atlanta Journal Constitution.
(Same source.)

Revolutionary appeared 7,877 times in the COCA, while revolutionist appeared 12 and revolutioner 0.