Akers vs. Elliott is close enough to be a coin flip, but some (non-SB related, where Jake has the NFL record of 16 points in a SB, 2nd most total career SB kicker points, and is perfect 9 for 9 in SB FGs) numbers that I think give Jake the edge:
FG% with Eagles (Regular & Playoffs):
Jake: 84.8%
Akers: 82.6%
50+ yard FG:
Jake: 61.7% (29 made in 8 seasons)
Akers: 47% (16 made in 12 seasons)
60+ yard FG:
Jake: 2-2
Akers: 0-0
Playoffs only:
Jake: 27 attempts, 1 miss
Akers: 38 attempts, 7 misses
Could also argue that only Akers has ever cost us a playoff game (2010, 21-16 home loss vs. GB where he missed a 34 and 41 yard FG.)
Few things about these numbers. Coaches, especially Andy Reid, rarely attempted long FGs until probably around 2010 or so when teams started trying them with more regularity (I look at a guy who had a long career like Adam Vinatieri and the same pattern occurred with him around 2010). Back in the early 2000s, a 50 yard FG were a rarity. So this isn't an Akers thing since later in his career, once the shift occurred he went 12-18 on 50+ FGs. Akers long-kick percentages are simply skewed due other factors like coaching decisions. I'll also say, the way Elliot has been trending, if he makes it to 12 seasons, I'd be willing to bet those %'s nose dive as he ages. He looked flat out unreliable as a kicker last season and if he continues his trend, he won't be around in 4 years.
I see the Elliot argument is trending in the same manner the Eli Manning HOF arguments trend. People want to put more weight on games in the playoffs and not look at the more dominant player based on his peers.