I have some reviews to do (I'm a slacker and I think it's been since July that I've done an Ipsy vs. BirchBox post), but I wanted to take just a sec and talk about them in general first, and post some links for ya.
I'll start with Ipsy.
Ipsy is pretty great. It is more make up oriented (whereas BirchBox does send makeup but seems to be more hair and skin care oriented than Ipsy is), and I love that each month comes in its own makeup bag. I also feel like the sample sizes are most often not really sample sizes. For example, blush and/or lipgloss is usually full size. Nail polishes are always full size. Eye liner and brow pencils are full size. You get the idea.
Also, Ipsy has links to get discounts on full size items that are sent to you in your bag each month. So if you get something and love it, you can buy a full size at a discount that month!
Ipsy used to not really have much of a points program, but lately they've adopted a system much like BirchBox. You can review the items you get in your Ipsy bag, and you receive points for each item reviewed. After so many points, they send you products. I've received a bracelet (that I adore and wear all the time!!), some OPI nail polish and Urban Decay eye shadow. Right now their points are offering NYX eyeshadow, Benefit mascara and some hair accessories. So, that's pretty rad.
Here is the Ipsy link: http://www.ipsy.com/?refer=u-hfwytq3dyjp23na
On to BirchBox.
I love that BirchBox has an amazing points system. For every $10 that you spend (i.e. each month or more if you order full size products), you receive 10 points. You also get 10 points every time you review a product (and each BirchBox has between 4-6 products a month....so that's anywhere from 50-60 points a month). After 100 points you get $10 credit to the BirchBox shop, and you can save up your points. I've got lots of free stuff, people.
Also, BirchBox gives you free shipping on any of the products that came in your package that month, and if you purchase a full size item, they often send you larger than average samples of really great products (like this Living Proof Style Extender. LOVE!!) and they last a long time. I love that their sample sizes are lots bigger than I'd expect.
Here is the BirchBox link: http://birch.ly/17ihbTX
Both are just $10/month and I love them both!