30-30s come and go I have two at this time have bought revamped and sold at least a dozen in the past ten years.
I recently sold my .357 CB and do miss it. I was getting to the point where I just don't have time to play with all my toys. I have less components I need for reloading.
Hunting up to deer and hogs, I see no difference they both do that job well. Home defense, ditto they will both do that well. For me there is an old side by side 12 ga double that I can reach from my bed when my dog alarm goes off.
Now back to the original subject which one to have. If you have neither then go with either, you will not be disappointed in any choice you make. The .357 is one of the most fun guns I've ever owned and used, plinking with light loads is fun, recoil up to the highest power loads is manageable. Range makes it a 125 yd gun though I have shot two bucks at over 150 and one at slightly over 200 but then I knew the gun and it's capabilities.
The 30-30 make no mistake will out perform the .357 on every need, the 336 action has proven reliability and strength beyond that of the 1894, my last deer was shot with my 30-30 at a range no 30-30 should be used but then I knew it would do what I was asking of it.
Bottom line, buy either, trust either, and learn what it is capable of in your hands. Home defense that sound a 12 ga pumps action racking a shell in has avoided more confrontations than any other firearm bar none.