The logical thing to do is keep both on hand. The 17" bayonet on the front of a SMLE might be useful if conditions deteriorate enough or if those pigs keep coming. The 10 round SMLE must have been something going against a 5 round mauser.
I do have a Pattern '07 bayonet for my SMLE (a bayonet whose design was lifted wholesale from that of the Arisaka of 1905). With a good team of dogs the bayonet can be used quite effectively to kill wild pigs, even without the rifle, or so I've found.
