It's always nice to have new grooves for best performance. The sevens are six years older and Mr Vokey does a great job with his newer models. If there is little left on those SM7s, it well past time for an upgrade.

I get amused when I hear someone say you should replace your wedges every 60-70 rounds. I would be buying clubs 3 times a year.
The SM10s are really nice. I think if you try them you will notice a big difference over your current model. You will definitely be able to spin these ones much better.
That being said, when I was on holidays a couple years ago, frustrated after a round, I pulled a old wedge out of my dad's bag. I chipped in 3 times in the next 10 rounds. That wedge is still in my bag.