If minoxidil reinstates blood flow but it’s short lived as you say, what makes you think brotzu lotion will be more effective and long lasting? Because it’s supposedly going to attack dht on the scalp? Minoxidil doesn’t work because it can’t penetrate the scalp effectively. Nothing applied topically will be able to penetrate the scalp deep enough to be effective and if it does, you’ll be sides.
It is likely that minoxidil is a stronger vasodilator than DGLA, but those using just minoxidil have short lived results because by not addressing the issue of DHT, it doesn't take long before DHT essentially overrides the effects of minoxidil. If you use Minoxidil with Finasteride it tends to have much greater long lasting effects because the damaging effects of DHT are halted.
The lotion should be longer lasting as unlike minoxidil alone (without finasteride) it halts the progression of DHT. As for penetrating, thats why liposomes are being used. Whilst you're right about sides, the dose of s-equol is so small its almost negligible.