I have both. I've had my 600 350 Mag for over 50 years. I have had my 700 with 358 for a few years. I had a 358 BLR for maybe 20 years before that.

If I were going to hunt most anything in the lower 48 I think both would work. If I were going after Grizzly though, I'd go with the 350.

I really like my 350 and I like the 358. If I were to give one up??? I'd probably give up the 358, not sure.

All I've shot at game with the 350, I used 250 grain bullets. I suspect that lighter bullets would work well, I just have not tried them on game. As far as the 358 I've only used it on white tail and I have used 200 grain bullets. There definitely is a difference on recoil between these two loads.

You can easily make 358 brass out of cheap 308 brass - I do. I also have made 350 brass out of several magnums 7mm and 338 for instance, but I have a good supply of 350 brass.

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally