After reading many posts and contacting couple sellers, as well as Striker Ice folks, I ordered the Guardian jacket & bibs
from "Outfit-2-Fish", with very helpful Carol. (
www.Outfit2Fish.com)
The Guardian offers same amount of floatation as all their models but vary in thermal insulation mostly. Since flotation was my main purpose of getting an outfit and not the thermal aspects, I am also happy that from the savings will invest in other fishing "necessities". I also needed the lightest possible suit due to my need to be in motion.
Will report in future on the selection of the 20 degree protection outfit.