Gohan actually turns out to be stronger via powerscaling.
Gohan had less than half his power when he beam clashed with Cell, so he'd be over 2x baseline from that. Later on in the Buu Arc he only provided half the energy needed to revive Buu, so Buu would be over 4x beseline. SSJ3 Goku then dominated Buu while suppressed, so he's probably around 5x baseline and SSJ Gotenks should be equal to this and Base Gotenks (Post RoSAT) is even stronger than that.
SSJ3 is at least 2x SSJ2 since it allowed to Goku to overpower Buu who got half his power from an SSJ2 and SSJ2 is at least 2x SSJ since Gohan was able to match Cell despite losing half his power and it's probably fair to assume SSJ is 2x base since it allows Saiyans to stomp people who stomp them in base, so SSJ3 Gotenks (Post) would then be 40x baseline. Super Buu's around the same level as Gotenks, so Buutenks would be 80x baseline and Gohan was able to last 30 minutes against him so he's probably around 60-70x baseline at least.
On the other hand, Power Girl is only around ~20x baseline scaling from Superman.