I used Phil's Computer Lab's "DOS Benchmarks" and tried a few of the benchmarks with the various SETSPEED.BAT presets. The Superscape tests were kindof hilarious in some ways, but I tried the Doom and Quake benchmarks on the 386-33 and higher settings.
315 cycles ~ 4.77MHz 8088
Superscape 1.0 0.6fps; Superscape 1.0c 1023fps; PC Player Benchmark 0.1fps; Landmark 6.0 3MHz AT, 15.00MHz 287, 625.74 chars/ms
Superscape took a LOOOONG time to run at this cycle setting.
2750 cycles ~ 12.5MHz 286
Superscape 1.0 6.0fps; Superscape 1.0c 350.0fps; PC Player Benchmark 1.4fps; Landmark 6.0 28MHz AT, 131.60MHz 287, 5491.84 chars/ms
Superscape still took a long time to run at this cycle setting, but not as bad as at 315 cycles.
7800 cycles ~ 33MHz 386
Superscape 1.0 17.5fps; Superscape 1.0c 17.2; PC Player Benchmark 4.1fps; Landmark 6.0 81MHz AT, 373.58Mhz 287, 15603.81 chars/ms; Doom (max details) 9972 Realtics/7.49fps; Quake 3.0fps
26800 cycles ~ 66MHz 486
Superscape 1.0 62.5fps; Superscape 1.0c 59.3fps; PC Player Benchmark 14.3fps; Landmark 6.0 277.78MHz AT, 1283.75MHz 287, 54613.33 chars/ms; Doom (max details) 2994 Realtics/24.95fps; Quake 10.4fps
38000 cycles ~ 66MHz Pentium
Superscape 1.0 90.9fps; Superscape 1.0c 84.1fps; PC Player Benchmark 20.2fps; Landmark 6.0 393.07MHz AT, 1820.27MHz 287, 81920.00 chars/ms; Doom (max details) 2155 Realtics/34.66fps; Quake 14.7fps
Option 6 (forgot to note cycles and equivalence)
Superscape 1.0 11.1fps; Superscape 1.0c 110.7fps; PC Player Benchmark 26.6fps; Landmark 6.0 518.25MHz AT, 2395.10MHz 287, 109266.67 chars/ms; Doom (max details) 1676 Realtics/44.56fps; Quake 19.3fps
77000 cycles (forgot to note equivalence)
Superscape 1.0 0.0fps; Superscape 1.0c 170.5fps; PC Player Benchmark 41fps; Landmark 6.0 798.12MHz AT, 3688.50MHz 287, 16384 chars/ms; Doom (max details) 1140 Realtics/65.62fps; Quake 29.5fps
200000 cycles ~ 300MHz P2
Superscape 1.0 0fps; Superscape 1.0c 443.2fps; PC Player Benchmark 106.7fps; Landmark 6.0 2073.6MHz AT,8000.00MHz 287, 419520.00 chars/ms; Doom (max details) 533 Realtics/140.13fps; Quake 74.6fps
The 386-33 benchmarked in Doom about what a 386DX-40 would, Quake ran quite a bit faster (must be the floating point performance).
On the 200000 cycles setting, the Superscape 1.0c ran really jerky with lots of missed frames, yet shows a high framerate. Doom showed lots and lots of tearing on the 720p TV I was using.
Not sure why the chars/ms in Landmark was an outlier at 77000 cycles. I need to rerun that, maybe I wrote the number down wrong.
Note that the Doom and Quake has sound off by default in Phil's benchmarks. I'm going to try again with sound on to see what happens to those framerates, and to see if the sound is OK. That may be why the Future Crew demos (particularly Panic) don't run right, they must use weird timing tricks to get the sound in there and there's some synchronization of the music to the effects itself. Timing is pretty critical.
Another thing I noticed is that Wing Commander runs pretty decently with setspeed emulating a 386-33; the opening sequence with the conductor runs about right and you get the fireworks and stuff. Too high a speed and the opening sequence is inexorably slow-- the conductor scarcely moves, and you never see the fireworks, and the animation when running out to the hangar bay is also very choppy and even parts missing.
Hopefully this data helps-- the benchmarks with sound should reveal more.