I didn't follow.

The underlying analysis though requires a little bit of work.

The advantage of going second is basically some mathematical representation of the advantage of knowing what you need to score. The bulk of the advantage only applies when the other team scores a TD and then you are given some small number of additional downs at your disposal (let's call it 2-3 fourth downs on average on a drive that needs to go that length) to allow you to score the TD to avoid a loss. Then there's also the advantage of knowing when you can call conservatively because a FG will win or at least tie. A 2007 study of college football showed no advantage in the first five years of OT (49.4 winning %) and a notable advantage for the next six (62.5 %). Not sure the latest. But assuming it's more common to play for OT I'd guess there's like a 10 percent advantage in college OT by going second.

I'm not sure the degree of the college advantage is directly transferable here. I'd guess the NFL advantage is more muted than college. Because you might convert on fourth in the NFL and still be 60 yards away from scoring and ultimately fail at a greater rate than if you converted on fourth down in college and are now only 15 yards away from scoring. In other words, it's more likely that even after you take advantage of the extra downs, you still fail. Also, the college stats presume that after a tie in 1st OT you still get an opportunity in the second OT even if you give up a score. That's not the case in the NFL.

On the other hand, there's a particular advantage that's easy to see of going first by getting the first sudden death opportunity in the event of a tie after two possessions. Standing alone, the sudden-death advantage was something like a 10-percent win increase (60 percent of receiving teams in old-school NFL rules won--though that advantage may have increased over time as offenses and kickers got better and longer). But that advantage only applies when both teams are tied after two possessions, so you have to calculate those odds.

Off hand, it would be silly of me to draw a strong opinion without better data.