I don't know, I've never used the stock mini-whip antenna that came with the dongle. I would think it would rely mostly upon how well a signal you can copy with it. Almost certainly your distance will be shortened, so hopefully you live right on the water!
If you like this, check out my YOUTUBE page for recent samples of other cool things you can do with a $20 "toy"!
I'm amazed I hear as much as I do on AIS. East of Portland to the Coast. 3-foot discone, 230 elevation. Hills in the distance all around me. 60+ miles is a regular. Good clearing around me which I'm sure helps. I speculate "knife edge" on some of those hills.