I compared the paint as far as I can see, it is a very close match on the PT. To me looks exactly the same. If you use your PT like I use mine, it all looks the same anyway after it gets good and dirty.
I would go with the spray per my link, more control and less running with an even coating, should be better in corners and tight areas. Not sure if you can buy the equipment paint in stores in spray form you may be able to find it. I really didn’t try. I would also use the extra clip on handle. You can buy these at Home Depot for a few dollars.
I think with the rattle can you should get a very good paint job. Turn the can upside down and push the button for a second after each finished coat, or until you get all of the air out of the line then wipe the tip off with a paper towel. I would do this after each coat applied and before the next spray session to decrease paint splatter. I would start with degreasing and cleaning off all oil / dirt. Then a first dusting coat, let it dry then go to the next even coat. If you want it to look really nice start with a primmer coat. The Rustoleum is a high performance fast drying Enamel.