I prefer to research more than one source
From what I know, boa males tend to have bigger spurs, but it is not a guarantee. If you really want a properly sexed animal, popping and probing are by far the most accurate when done correctly. I'm not saying I know everything about dumerils boas as I've never had one, but it is the general rule is not to trust spurs alone for most species.
Anyways, very pretty dumeril OP!