You get less for your money in phenylprop but the half life is what we were told Prop was a for a while.
The bad information we were fed for years was prop's half life was 36-48 hours. Now we are starting to figure out its less than 24 hours. More like 18 hours. Might be because most people (including myself) like thin oils (MCT, Miglyol812, EO) and that reduces the time to peak concentrations.
Phenylprop in MCT/Mig/EO fills that spot between 18 hours - 48 hours. My trough isn't anywhere near close to as low on phenylpropl as it was on regular prop and the blend also helps the pip.
Also, prop has the lightest ester. Phenyl prop has close, if not, to the heaviest. So you are getting around the same concentration you would have a Enanthate if you average the weights of the 2 esters out.