I use the probe to let me know when it's reached temperature and verify with the instant-read. I haven't noticed a difference between them, but I probably should check that. And I probably should calibrate more often. But from what I can tell by looking at the food after it's done, they've been accurate.
Two methods then. Thanks.
There were lots of times cooking chicken where my instant read, stuck in in several locations, said the chicken was done, but when it came off the grill and onto my plate I could plainly see (tell) it wasn't.