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41U-61 is a great position. Paul and I wrote up a page on it for Book C (which hopefully some day will get published).
I added nacbracs to the captions above. For 41U-61 (top left), I averaged your GnuBG [H P38 K51] 5k with Snowie [H P16] 5k and some trunc data for the weaker two of the four plays. For 43S-61 (top right), I averaged data from three bots.
As a consequence of 5 duplication, if Blue correctly plays H (Hit, 13/7 6/5*) in the upper left, White has only 22 return shots. If Blue (erroneously) plays H in the upper right, White has 31 return shots (I didn't count just now, but that's what the rough draft of Book C says :)).
The most striking contrast is in the comparison of H (hit-and-down) to X (hit-and-split, 24/18 6/5*). H is better than X by .083 in the left-hand diagram, whereas X is worse than H by .015 in the right-hand diagram, a swing of nearly .100.
Even P vs X (where P means Point, 13/7 8/7) is a swing of .065 between the two positions. As I've rambled on about elsewhere, the optimal time to split is against a 10pt builder.
Nack