When it comes to Darling, I don’t think it is the best nude ever made, because it does have its faults, but so far it is the best drugstore nude I’ve discovered (and probably not only me, because it received Beauty Bible awards!).
I’ve never had any MAC lipstick (yes, I said it, meh) but apparently Gosh Darling should be a dupe of MAC Myth, if I remember right? Many often compare not only shade but also the consistency. The consistency is extremely creamy (almost like 17 lipsticks) and mine began to slightly melt (even though it was -4 degrees outside!) and got a bit slanted in the packaging, but so far it does not make the application more difficult. The creaminess also causes that the lipstick seems to be running out pretty fast, which is not amazing (£6.50 is on a slightly more expensive side in the drugstore world), but the creaminess is essential for a nude shade, as it glides nicely on lips.
Overall, I would say go for it. At least swatch it in a drugstore, as it might not suit your skin tone, but if does, there is a high chance that it can become your favourite nude.