If I recall, on was fully retouched and the other not. But, mark words...you'd be hard-pressed to find someone as UN-photogenic as I am but the way they did my makeup, my hair...the lighting, the photographer. I spent a small fortune there (couple hours' work) and bought the Groupon again the other day. This time I am saving up...
You're not obligated to spend/buy more. But, if you're new to this, it may be helpful for you to see angles and lighting and makeup for your own home-made photos, later.
Groupon has a London studio offering boudoir shoots often.I just make sure I check their gallery first before I buy! And--again- for some of us the time is too much of an investment as well. I'm not trying to evangalize, I'm just sharing my experience and reaction.