The MUFE Lab Shine formula has 3 different formulas, the Diamond Collection being the sheer, sparkly one. I compared the shade D16 (shimmering beige) to the MAC Dazzleglass in Baby Sparks.
Both glosses have a brush applicator (which I am not fond of because the bristles tend to splay after some use), with the MAC one being a tad bit flonger.
MUFE Lab Shine in D16 (shimmering beige)
MAC Dazzleglass in Baby Sparks
L-R swatches in natural light: Lab Shine in D16, Dazzleglass in Baby Sparks
L-R swatches with flash: Lab Shine in D16, Dazzleglass in Baby Sparks
Lab Shine in D16 on lips
Dazzleglass in Baby Sparks on lips
MUFE's Lab Shine glosses are supposed to have a slight apricot fragrance, but I thought it was quite strong and very fruity. The Dazzleglasses have a slight vanilla fragrance that all MAC lip products have, and is much more subtle than the MUFE glosses. The Dazzleglass is also stickier than the MUFE one so it does last a bit longer on me. Overall, both glosses are very similar in shimmer and are sheer in color. The MUFE gloss contains 0.09oz and is $18 which is a better value than the MAC Dazzleglass, which is 0.06 oz and is $19.50. I don't wear sparkly glosses all the time so I don't care too much that the MAC one has less quantity, as they have quite a good shade selection and are more readily available.