I used to use 9-42 in Eb (Ibanez Jem style guitar), felt great for soloing, but a bit too flappy for fast metal rhythm.
Then I switched to 10-46 in Eb, which felt and sounded great.
Now, because I have to collaborate with people that tune to E, I had to change back to 9-42.
Problem with 10s in standard tuning is that they make vibrato and bending much harder.
I also often use vibrato with the note bent, and a wide vibrato becomes difficult to achieve, say with a 1.5 tone bend on the G-string, while with 9s it’s a piece of cake.
Also, pressing down on the string is harder (more tension) so playing fast is harder as well.
Vibrato on lower strings loses all its range compared to 9s and bending with one finger (which I often do) becomes much harder.
I did A/B comparisons in terms of sound and to me the difference between 9s and 10s is small, especially when the tone is dirty/distorted. 10s sound a bit more bassy and clear, but 9s can be more easily manipulated (vibrato and bending) which affects the sound too.
Also, different brands have a slightly different feel and certainly different sound.
Addario strings sound too “new” for my taste, overly bright and metal-like. Ernie Ball and GHS is what I regularly use.
Short answer:
9-42 for all guitars (tuned to E-standard) and a 0.056 when tuning to low B (which never happens anymore, since I use a Whammy DT)