The F30 powder brush in this set is much smaller than the original F30. I would say it's more comparable to their blush/powder brush the F10 (in middle of top picture), but a bit fuller and fluffier. This one has the most shedding and bleeding issues when washed, since it is so large and black.
The F40 contour brush is pretty comparable to the original, a bit thinner and less fluffy. This works well for contouring or blush application.
The foundation brush, F60 is pretty much identical as well. I prefer to use this short handled one for my liquid foundation (if I use this, prefer my flat top brush however). I hope in the future Sigma makes a flat-top F80 short handled version, that would be awesome since so many people love that brush.
The E40 is nicer than the full size one, it's more tapered and less fluffed out, but that could just be because it's new and hasn't enlarged yet. I use these brushes for under-eye concealer.
E70 concealer brush is slightly longer here too (bottom brush), which is better in my opinion.
E55, eyeshadow brush is basically the same too. I like that the handle on this one is fatter than the original, it's easier to grip.
E30, concealer brush is better in this set too, it's longer, more tapered and thinner.
F50, duo fibre brush in this set is much different too, as you can tell compared to the full size F50 and the F55, it's basically in between in terms of size. I find it a lot floppier than the F50 too. I wouldn't suggest the one in this kit for foundation application, but it could work for blush.
I like this and prefer it to the Premium Travel Kit because I find the brushes more basic, ones that I would reach for more. All in all, the brushes are definitely different then the original full sized ones, some for the better. If you can't afford the full sized ones, or prefer the ease of the short handles, I would definitely check this kit out.
Disclaimer: This set was provided by Sigma for review consideration.
Do you have this set from Sigma?