I have not done PPO Akershus, but I like the Garden Grill a lot better for food and it feels less cramped to me.
We had an awesome PPO at GG in March this year. We had an 8:15 reservation, but they let us into the park just before 8 with all of the others. We were the second group to be seated. We were seated near the kitchen and on the upper section. This actually turned out to be an advantage. The kitchen didn't disturb us at all and, when the characters all came out (at the same time), they all came to our table first, as a group, before splitting up and making the rounds. Se we got some nice group shots with all four characters. Then, all of the characters except for Dale came back for a second round a bit later. Dale seemed to skip over us, perhaps because he'd already visited with the rest of the group. Dale excepted, all characters had visited us by about 8:30am. We were done eating (even our slow-to-eat kids) shortly after that, and were all paid up by 8:40. Our waitress gave us fastpasses for Turtle Talk, which were basically useless, sure, but I'm not going to complain. Soarin' didn't open until 9, or I believe even a few minutes after on that day, so we had more than 20 minutes between finishing our meal and beginning to make our way through the queue to board the ride.
When we had lunch at Akershus once, it was nice, but we were stuck in a corner and it was tight. Not great for a place where some of the food comes from a buffet.