I don't think you should base your decision of residency on which is "easier". Remember residency will be difficult regardless of what specialty you choose, only the level of difficulty will vary. You should sit and think of pros and cons for each. I think quite a few people that go into peds do so because they are more interested in treating children vs adults. Family practice offers a broad spectrum of patients, you have the ability to do procedures and even go on to complete a fellowship (OB, sports medicine). I chose peds because I enjoy children, more so than the noncompliant diabetic, obese, smoker who came to see me for a referral to gastric bypass surgery because they don't want to diet and exercise....this was actually one of my FP patients. The other benefit w/ peds is that you can subspecialize in any field after completing peds residency (derm, cardio, pulm, endo, ER, etc etc). As a side note, most of the pediatricians I worked with as a med student were some of the happiest doctors I met because they enjoy what they do, despite the low pay.
Good luck with your decision!