Have a lot of each style and for me at least prefer the Bisley. many prefer it for the heavier recoiling loads - hence the reason the better gunsmiths use the Bisley configuration on their big bore stuff. It's a love it or hate it feel though. Some just cannot comfortably grip the Bisley styled grip. Just gotta find one and feel for yourself.
Easy enough to change the trigger, hammer and grip frame out later if you choose to.