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Pick any number that you want, make the results come out any way you want. I have shot 130's in my 30-06 and they are 100-150 fps faster than a 130 in a 270. Which means it is flatter shooting out to 300 yards.
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There's lies, damn lies, and statistics... sure.
But 130gr @ .30 caliber has a lower BC than a 130gr @ .27 caliber. It doesn't fly as well in the air. It will drop farther, faster, because it has more wind resistance due to greater frontal surface area.
To compare apples to apples you need to use the same BC, not the same bullet weight.
.270 with 135gr Sierra MatchKing has a BC of .488, typical velocity ~2950fps.
.30-06 with 168gr Sierra MatchKing has a BC of .462, typical velocity ~2850fps.
With both zeroed at 200 yards using defaults in PointBlank, you get a drop of 39" in the .270 @ 500 yards. You get a drop of 43" with the .30-06 using the 168gr load @ 500 yards.
Comparing the same weight bullet (which is wildly unfair to the '06), the '06 is loaded with a 135gr Sierra Matchking with a BC of .370 at ~3100fps and with a zero of 200 yards in PointBlank we get 39 inches at 500, but if we go out to 700 we'll really see difference between the two: .270 @ 135gr = 89 inches and .30-06 @ 135gr = 109 inches.
The air resistance smacked down that light .30 caliber bullet.