Neutral balance to a 360 crank?

I'm pretty sure that 273 rods are heavier than Eagle SIR & Scat I beams. For reference, 360 +.030" flattops by Probe are advertised at 476 grams, SRP flattops are advertised at 489 grams, Ross is 484 grams - lighter than any other off-the-shelf pistons I've been able to find, forged or hyper.