[adorno]

I thought blackholes had a difference in mass, depending on the amount of matter that went into it... more mass absorbed = more massive blackhole, with bigger gravity effects surrounding it.

Bigger gravity, yes. But, bigger size? I thought not! If a singularity is of just one size, then the illustration would have to be of equal sizes for both black holes.

[LibWhacker]

The illustration is not of the black hole, proper, but of the event horizon which, of course, is larger for more massive black holes.

[CarrotAndStick]

No, not size, but mass.