Had both.
358 if I have to choose. Had a Ruger 77R 358 since 1983 until I gave in to selling it in 1995.
Had a Ruger 77 Mark II 350RM with pretty figure walnut stock.
It’s like choosing between Lynda Carter and Jessica Simpson, both are excellent!
If I have to choose, I love the 358 and always will
(Wanna buy some 350RM brass?) LOL!