I run tubeless on both my Commuter (32mm slicks) and my Road Bike (25mm tires) I started with Stans but it never held well at road tire pressures (~60psi on the commuter, 80 on the road) Switched to Orange which worked better. My local shop stopped carrying Orange Seal and I went to Stans Race which also works well at higher pressures. That said I still run into issues if the hole is big enough.
I worry about availability and compatibility between sealants more than slight improvements in performance. If I were to use a lesser known brand and run out and can only get Stans (or Orange Seal etc) at my local shop (or at the race support shop) I don’t want to worry about either cleaning the old stuff out of the tire or if the chemicals are compatible.
My biggest recommendation if your going to switch to tubeless is get a plug kit and use it.