I would trust neither!
If you want an accurate thermometer that you could trust your chicks life with get one of these. But before you use it replace the battery ( LR- 44 ) or 357 battery.
http://www.ebay.com/itm/271440189701?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_651wt_900