Haven't seen that test...
I saw the comparrison done with a 125 opti vrs the 115 ct on streaker boats, there wasn't much in that from memory. Opti, surprisingly came out slightly better ecconomoy, but the 115 ct had, ever so slight, better hole shot and top end. The main out come was the fact the gap has well lessoned between 2 and 4 stroke, the 125 opti was no slouch an an engine either.....
Col