Yes, but when we talk about high drain batteries, higher voltage during high load is better. Since higher voltages means our LEDs get more current, and (if sufficiently cooled) that means we get more light.
We often mod flashlights to be “hotrods”, where output is king, and runtimes not as important. That’s why voltage under load is more important than maximum mah.
if you look at HKJ’s graphs, you see that the extra capacity the 5200 mah has over the 4200 mah is @ 3.4V (for 3A loads).
And if we then take a look at djozz graphs (post #51, with both XM-L2 and XP-G2 graphs) we see that at 3.4V our hotrod flashlight isn’t as hotrod anymore.
And if you’re happy with that kind of output, you really don’t need high drain batteries. And if you don’t need high drain capabilities, you would be well served by the extra mah a 5200 mah battery has 