The only difference between cypionate and enanthate is that there are 8 carbons in the cypionate ester, and 7 in the enanthate. Because the ester is included in the weight of the test as a whole and not seperately 100mg of enanthate is slightly stronger and less long acting than 100mg of cypionate. Some ppl may notice a slight difference with effectiveness or frequency of side effects but for most ppl, the difference is neg. These long acting testosterones as well as sustanon/omnadrene benifit from being front loaded, especially if its being used alone.
Testosterone propionate for some reason seems to have slightly different effects on many ppl than either cypionate or enanthate. Because of it's half life prop. should be administered eod day unless large doses (300-400mg) in which case e3d would seem reasonable. The frequency of injects causes prop to be stacked with other eod injectables like fina and winny. This may be another reason that it is thought of as mainly a cutting drug.
The property that make prop unique among the esterfied testosterones is of course its short half life. I believe this can be used to the most benifit at the end of a cycle to cut down on time between a cycles end and the recovery period in which natural test levels are brought back to pre-cycle levels. If a 10 week cycle was planned this could be achieved by stopping use of enthante/cypionate at 8 weeks, or sustanon/omnadrene at 7 weeks. For the remaining 2-3 weeks 100mg eod would be sufficient to continue gains from 500mg of sustanon or enanthat/cypionate because the testosterone will still be released over a number of weeks following their last injection.