I had been using Griot's for a number of years, long enough that the pump head on the gallon jug broke from old age.
At that point, a bit of laziness set in, and I used Meguiar's Gold Class for a little while. It was easy to get locally. People would complain that it smelled like bad cologne, but, having scrubbed up two little ones years ago, it reminds me of Johnson's Baby Shampoo (gotta say that nothing smells better than a freshly-bathed baby).
As I bought a new foam gun in the fall, I was sent a sample of DP Xtreme Foam. I used it and liked it.
When I was packing up my "road kit" to go work on my brother's Suburban about a month ago, I discovered a half-full, small-size container of Griot's.
I just "had" to compare, so I fired up the Griot's in the foam gun. IMHO, even-steven with the DP.
When the 128 comes out to play in March, I'll probably grab another gallon of Griot's, and a new pump-head.
Do bear in mind that Accumulator has a pretty specific wash routine. As they say in the advertising, your results may vary, though I think that both work admirably in foam guns.