The difference comes if the steel track isn't kept clean and rusts and conductivity decreases.
Rust... I tried rusting some steel track, left it outside for a while, about six weeks in all kinds of weather, no rust. Was trying to get natural rust on it to use it for an abandoned track scene on my layout. It is zinc coated such as an old water pail or laundry tub, all I got was the white zinc dust oxide!
I also had some old steel track along with NS and brass from up to 50 years ago stored for 35 years in all kinds of environment, wet to damp basements, attics, out buildings and unheated garages, The NS and brass were far worse corroded than the steel, which only had a tiny bit of rust on the tips where the connectors were, removed with wd 40 and a rag.
Since retiring 3 years ago, I came back to the hobby and am still building my layout and have used some of the old track. I jumped into DCC with a vengeance and purchased the Bachmann EZ track for some of my layout, and run in DCC with no problems with using both steel and NS. I do clean it with metal polish, Maas or Flitz once every 6 months, I run my trains every day again with no problems. I use no abrasives whatsoever on my track, scratches, no matter how fine will collect dust, dirt, bits of metal, oil, grease, etc. and will cause problems.
Rust... I tried rusting some steel track, left it outside for a while, about six weeks in all kinds of weather, no rust. Was trying to get natural rust on it to use it for an abandoned track scene on my layout. It is zinc coated such as an old water pail or laundry tub, all I got was the white zinc dust oxide!
I also had some old steel track along with NS and brass from up to 50 years ago stored for 35 years in all kinds of environment, wet to damp basements, attics, out buildings and unheated garages, The NS and brass were far worse corroded than the steel, which only had a tiny bit of rust on the tips where the connectors were, removed with wd 40 and a rag.
Since retiring 3 years ago, I came back to the hobby and am still building my layout and have used some of the old track. I jumped into DCC with a vengeance and purchased the Bachmann EZ track for some of my layout, and run in DCC with no problems with using both steel and NS. I do clean it with metal polish, Maas or Flitz once every 6 months, I run my trains every day again with no problems. I use no abrasives whatsoever on my track, scratches, no matter how fine will collect dust, dirt, bits of metal, oil, grease, etc. and will cause problems.