I've got several small briars.
This Bruyere Garantie [no brand] Rhodesian is one.
A very good smoker.
I've got several 60s French Skippy pipes like this little Skippy Prince Paneled Bulldog [my favourite]
And I've got a Dr Plumb Dinky [but forgot to save the pic] and a bent Dr Grabow Duke.
My small bowls are used for stronger blends, for a quick smoke or for drier Balkan or English blends.
I smoke them half as often as my regular sized bowls but I've not ever noticed any real difference with the smaller bowls.
Rarely do I leave a small bowl half smoked like I regularly do with larger bowls.
I'm not sure why exactly but I really enjoy smoking my smaller pipes.
It must be an 'in the mood' thing and maybe the satisfaction of finishing a bowl that leaves me satisfied.