Anyone Know about the different between Toyan 4 stroke engine FS-S100AC and FS-S100WA1?

[rcfancier]

I just want to know why this two engine with different price?

 

[rcfancier]

Sorry, this is the link of them https://www.rcfancier.com/Toyan-rc74056.html

 

[TDL]

If you want free advertising, at least spend a little time to know the audience here.