I'd love to hear from someone who's still using SVN professionally and can explain why they prefers it to Git. I used SVN very early in my career. I think the only good thing I can say about it is that it's easier to learn. It's quite easy to teach a junior dev how to use SVN. Git takes much longer to master.
Merging seems the same on all 3 version control systems I've used... I've heard that git branching is better(?), but haven't seen that being used anywhere really.