Are All Digital Thermometers Created Equal?

I use a Raytek brand with laser pointer I bought at Grainger about 25 years ago. Think I paid around $100 plus for it at the time. I used to get it calibrated every couple of years when I was working (work paid for the calibration) but haven't had it done in past 2 years. There are many brands available from a $30 HF unit to well over $500.
A friend of mine has the HF unit and it reads within .05 degrees of my more expensive Raytek. I don't need to read exact temps within hundredths of a degree as long as they are within a degree or two is fine for me.