From a plot perspective they're equals as a clan,as noted by Tobi,when a faction hired senju the other hired Uchia,and the 2 leaders forced stalemate with each other more than once
But from an idealistic and power perspective I believe the Uchia's are a tiny bit more powerful than their rivals because they can ultimately have access to the powers of the
Rikudo Sennin himself via the Rinnegan(albeit a jubi-less Sage of course)
That purely from a power perspective,but from an idealistic one,the senju's way to power is less dramatic and less filled with blood and sacrifice.While the Uchia's as noted by Itachi is clan tainted in blood,because they need to slaughter their brethren in order to attain more power,while for the senjut it is not so
And the senju are driven by a non tangible source of power,aka the will of fire,and that is what according to the author defines the epitome of power.It is what Hashirama had and what made him overcome Madara at the vote,and it is what made the younger son overcome the elder
Basically the willingness to protect someone esle,the weaker,and not fighting only for one self,which is what defines the uchia combat style and ideology(powers that alienate you from your bonds,like Itachi,Sasuke and Madara as prime examples)
Do you think Senju's are better than Uchihas?
I do because Uchihas have to kill their bff for Mangekyou and Mangekyou makes you lose eye sight same for Izanami and Izanagi......and Susano's hurt the users body.....
But Senju's they're just all chill with things and have good bodies and chakra

Damn
Just want to say the red moon in your siggy is great
Yeah I guess in the past they were sead to be stronger.
nice find with the siggy