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High mass vs low mass bridge

This has been flogged to death, there are plenty of reasons to buy a modern high-mass bridge, like better adjustability for string height, spacing, etc, but dramatic improvement in tone isn’t one of them. The original Fender bent plate still works fine, but I always thought it was kind of ugly. Leo thought so too, hence the ashtray cover. If you have a perfectly balanced bass, don’t mess with it. A high mass bridge might help a little against neck dive, but you’d get more effect using ultralite tuners.
 
The year was 1992, and in a vain attempt to emulate AJ's 'Career Girl', I took the bent plate bridge off my '78 jazz bass and replaced it with a badass II at a cost of $80.00 AUD.

To make a long story short, I wasted $80.00. Sonically there was no difference and the addition of the badass made an already heavy bass, just *that* much heavier. LOL. Oh well...
 
In my experience the only thing in a bridge that would make a difference is saddle types. I've learned to dislike sharp saddles where strings rest on a sort of knife edge. Always hard for me to get setup right, sometimes dead sounding strings. Hipshot A type or clones is the best, followed by fender round types. Haven't tried the new Foderas, they seem to use thinner round tubes as witness points
 
The atomic mass of iron is 55.8; one mole of iron atoms would weigh 55.847 grams. Aluminum, would be in about 1/2 that weight. So clearly an iron bridge would have more mass, and thus help vibrating more, spark some mojo, etc.
I’ve been thinking what a bridge made of livermorium would sound like, with a scary atomic mass of 292. Beyond decaying and eating you alive before you end your first tune, given its radioactive condition, I am pretty sure that the B string will finally sound - at least for a short while - thunderous.
 
This is a rather poor comparison video as he digs in much harder with the high-mass bridge. The volume is also louder with the high-mass. The only time he really digs in hard with the the traditional bridge the tone just breaks up into fret buzz, which suggests to me that the action was set slightly higher (which made it possible to play more aggressively) with the high-mass. There are too many variables to make any meaningful comparison IMO.

Personally I've always preferred the dynamics and "feel" of traditional, vintage-style Fender bridges. Or at least that's what I think... But again: Too many variables. I really don't mind playing ANY type of bridge as long as it doesn't have any sharp edges, has an acceptable intonation range, provides a decent break angle over the saddles and allows the bass to be set up properly with correct strings spacing and action. As long as these boxes are ticked I don't really care whether it's a Gibson 3-point or a $$$$ Babicz. Bonus points for fast&easy setup though.
 
I wonder just how much more mass does the Fender high mass bridge have compared to the standard bent plate one. I bet it's just a few grams, if at all.
A few ounces is more like it. I once weighed a bunch of bridges, including the high mass Fender and a Fender bent plate, and I seem to recall at least a 4 oz difference. That said, it’s been a few years, but I do remember it was a good bit more than a few grams.