No, I'm mostly looking at the chelicerae and checking for the cheliceral band. One of the more recent photos seems to show them more clearly. The other thing is the longer setae on the legs are white in B. hamorii whereas they are yellowish on B. smithi, so they have more contrast against the black of the leg segments.
The challenge with all of these identifiers is that they are much more clear/distinct shortly after a moult. This spider looks fairly dull and later in the cycle, so it's more of a challenge to determine. Ideally the seller has an old moult still, and assuming it's female they will be able to check the shape of the spermathecal base plate. This is an elliptical shape in B. hamorii, but strongly divided and triangular in B. smithi.
@dangerforceidle Wow thanks. That's new info for me regarding the setae on the legs. Yeah, I agree the specimen is looking a bit dull which makes it very tricky..
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