Which one is better? Most of the time my bike parked indoor but would be nice to have water-resistant option. Prices r about the same, so does that "breathable" actually do any magic?

 

If you want water resistance, an indoor/outdoor cover is your only option. My covers only ever get used in my garage, so I got the premium indoor cover from Harley. It protects the paint well and is breathable so I've never had a problem with corrosion even though my bikes get stored for 5 month stretches.

 

I rarely use a cover on my bike/trike as they're nearly always stored indoors with the exception of when I'm on a trip.

I don't even have a "for rea" cover for my trike (which I ride 99 44/100% of the time) is to keep the dust off of it when I won't be riding it frequently but when I do cover it I use old King Size bed sheets.