Close contenders in the bombproof/ heavy boat anchor area. They're both triple walled. Can't go wrong with either. B43's do come in more colors through if you're into that sort of thing.
However, when EERO's came out, the FSFG scene was dumping out the B43's left and right for them. To the point that EERO's were scarce. Not sure if this was over the hype of them being new or something else.