The question is between a holster with built in belt loops or a clip on, single or double clip, type. I can see the clip being easier to get on and off but the loops being more secure. So what do you use?
It's really purpose and gun driven........................
When I conceal carry it is IWB 98% of the time with a Sparks Summer Special.
OWB hiking or riding a ATV in Penn's Woods...... a Bianchi 111 Cyclone cross draw is the holster of choice most of the time....... for years a Bianchi 5BHL thumb break was... and I guess still is...... a favorite.
I just received a custom leather OWB holster from D.M. Bullard for my SIG P938. It has belt loops. There is a photo of it and the gun in another thread in this forum.