The double ester trade name meant Motul 300V contains both di-esters and polyol-ester base oils. It's among Redline, Maxima Ultra, and Fuchs Silkolene Pro that are probably regarded as the best motor oils, especially for high density powerplants and endurance racing.
I'm running 300V Factory Line 4T 10W40 in my Suzuki V-Strom and shifting, clutch feel, and revability are great. Besides handling heat and not shearing because it contains no viscosity index improvers, supposedly ester base oils prevent and even remove any deposit buildups on the rings/ ring land areas and anywhere the oil touches. In its own way it's a solvent and a seal sweller, and seems to run 15° cooler than other oils due to better heat transfer. The esters also have high polarity molecules which cause them to electrostatically attact to metal sufaces, which in turn reduces dry start issues, valvetrain noise and combustion blowby.
Get a used oil analysis on that Competition 15W50 when you're through with your OCI, the 100°C viscosity will likely be unchanged from a VOA, and it will maintain a high flash point if you don't have a serious fuel-diluter. The only drawback is extended OCIs should only happen with UOAs to back it up because the acid neutralizing capacity is somewhat less than most other Group 3 & 4 oils. While 300V may be marketed as a racing oil, it is not a strictly racing oil, it is very well sorted for everyday street use in any engine and can hold up well for 5 - 8k intervals.