Which inkbird should I buy?

[That_guy]

So decided I wanted a third party thermometer for the PB,trying to decide between the ibt-4xs or just make the jump too the ibbq-4bw.
I want to mainly use it too check the temp at the grates since I don't think this thing is what it says it is,cooks tend to take way longer then they should.
Can but of these be used for grate temp? Aside from $$$ any reason to get one or the other?

 

[Jimsmokes]

I have the IBBQ-4T and regularly use one probe for grate temps. The other probe is the PB one.