Interesting thread...I have always thought that the Peacemaker was less similar to the Flite Streak than most think here, and in wing plan form it is (see the photo), with much more taper and larger stationary-flap area. BUT, when I sat down last night to analyze it a bit further geometrically, I found that I really should expect them to fly similarly, as reported, especially if the Peacemaker were scaled up a bit from 36.5" to around the Flite Streak's 42".
FWIW, I calculated a larger wing area for the Streak than what's on the Top-Flite box lid: 411 in2 vs 390 in2. Using that 411 in2 figure, I found the following:
Aspect Ratios: Peacemaker - 4.28, Flite Streak - 4.29
Outward position of aero center for each wing: Peacemaker - 46.3%, Flite Streak - 47.7% of half span
With all that taper, I expected the a.c. (position of MAC) to be more inboard for the Peacemaker, but they differ by only about 3%. If the Peacemaker were enlarged to the span of a Flite Streak, that would be only about .3".
I didn't look at tail moments. From wings alone though, these planes are very close. I still like the peacemaker wing better, though.
Well, as I said, this is just a FWIW from some guy who entertains himself with such musings.