The one with the higher cap percentage (eviscerate +) also has glucosamine sulfate in it. These two things are the only differences between eviscerate + and eviscerate. So mark the ones with the higher cap percentage as E +.
Hope that clears everything up. Interested in your feedback, I've ran Eviscerate, Smolder, and Burn Free numerous times but I've yet to have the change to run Eviscerate +!