So I figured I'd swatch my four most used and liked foundations, with their shade comparisons in natural light. I've often looked at the Foundation Matrix on temptalia.com for reference and curiosity. I'm not sure what shade in MAC I'd be considered, the only MAC face product I've used is my Mineralized Skin Finish Natural in Light which helps warm up and darken my face a bit (which may be due to it oxidizing on me). Most lightest shades are too dark for me, but I apply most products rather sheerly so I can work with them even if a tad dark. I aim to match/blend into my neck which is a good shade or two lighter than my freckled face.
These were swatched with the same volume of product on inner arm (slightly paler than neck), let sit for 15 minutes (the Estee Lauder definitely turns quite peachy after 5-10 minutes), pictured in natural light. The Mat Velvet comes out nearly white but dries down/oxidizes to a more reasonable shade. On my face, I think the Face & Body is the easiest match, along with the Revlon ColorStay (applied for light-medium coverage).
Due to the matte/heavier coverage of the Double Wear and Mat Velvet+, it's more difficult for me to work with and can settle into my pores even with a good primer. I use my fingers to apply the ColorStay and Face & Body by pouring onto my fingers, rub them together and patting onto face, blending out with gentle smoothing strokes. Depending on how my smooth my face is, ideally I just pat it all down which gives a nice finish.
I hope this helps other pale faced beauties out there!