E303 vs 2031

[TEXSN95]

These cams have almost the same specs, except that the 2031 has a bit less intake duration. But why do so many people have bad idle problems with the E? I've heard many more complaints about the E, and none about the 2031 so far. Does the split duration of the 2031 help with the idle, and/or does the 2031 pull more vacuum than the E?

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Clint L.
White 95 Cobra #3637
58cc GT40X heads with mild porting, Crane 2031 cam, FRPP 65 TB, 1.7s, Cobra intake, homeade cold air, 155lph, pullies, Tokico Illuminas, C springs, GW lower control arms, Steeda CC plates, aluminum driveshaft, Steeda quadrant, MSD6A, Mac shorties, off road hpipe, 2 1/2 ultra flows w/ dumps, R hood, Euro clear corners, stock 3.08s
13.61 @ 104.7 w/ 2.22