I vote yes! Here are some pics of a comparison I did.
HCG 29....
Internet cheapie...
Dollar Store.....
Equate....
Target brand.....
EPT....
Answer Early Results....
FRER old style bought on Ebay....
FRER new style....
As for OPK's I have had good luck with them too, but better luck with the answer brand (20 pack that you dip...NOT midstream) The IC's picked up the surge, but you have to test a couple times a day. I thought I had a comparison pic of that too, but I will have to dig around the computer for that one