Maple sold as many bench tops is soft maple. The bamboo is probably harder.
Dead on, man.
"Maple top" used to be advertised as a sign of quality and durable/wear resistant work surface/flooring. You used to pay a premium because you were getting Rock or Black Maple.
Nowadays, generally you pay the premium for Hard maple (Rock/Black) and get Soft Maple (Red/Silver/Bigleaf/Box Elder) - especially on the prefab and box store/catalog order workbench/flooring stuff... In my experience, if it is NOT advertised/specified/voluntarily admitted as Rock or Black maple, it's probably a soft species.
"Worksurface maple" was intended to be Hard Maple, Soft Maple is used predominately in the kitchen industry (butcher block that doesn't dull knives as readily) and other applications that don't require quite the density.
Depending on the species, the soft maples are about half the Janka-rated hardness of hard maple.
As far as bamboo, it actually is harder than EVERY maple (hard or soft). That's kind of misleading... Because it has to be pressed into slats/ply to achieve that strength... It's a damn grass after all, haha. You don't see very many bamboo 2x4's, ya know?
I prefer rock maple tops between 1.5 and 3"--- but I would take a soft maple over bamboo anyday.
Especially if it's priced less than the bamboo!
~Tejaas~
WTB: Snap-On Orange Hard Handle SSDP63 in Very Good Condition!