A few of the tentacles do have knobs. It was a cheap Craigslist purchase so I didn't really care which type it was
As far as closeness, they aren't as close as they look. Of course that doesn't mean it will not be a problem down the road. The torch and the frogspawn are from the same family so they might "get along" if they aren't too close and only touch occasionally (what I've been told). This is the problem with small tanks. You fill it with coral in the beginning so it looks cool and bc you're impatient, but then you end up selling some when they get too big.