I have one of each, 10" and 14". I like the 10" for close range hunting. I have a 2x Leupold scope and it makes for an extremely fast close quarters shot. I could probably do the same with my 357 max or 44 mag barrels, but I like the .30-30.
My 14" 30-30 has open sights and has knocked over it's share of silhouette targets. I would not be afraid to put on a nice 4+ power scope and hunt deer size game out to 200 yards with it.
Comments on the muzzle blast were right on the money. Recoil is different too. However, none of the targets nor critters my guns have been aimed at noticed the difference.
Good choice of caliber. If you only get to choose one, get the 14".
Steve