>>528618168
I did this awhile ago. I think I still have my notes/videos
the timings are predicated on the size of the target (due to hitstop).
And my timings were different. I timed from button press (so you're locked into the animation) until earliest possible cancel window.

For the largest targets (and therefore the largest hitstop)
1h resolves from button press to earliest possible cancel window resolves in 4.2s (4.250 but who cares)
2h resolves from button press to earliest possible dodge 4.3s
Unsurprisingly 2h takes slightly longer before it can act at the end of it's combo and it's first hit is slightly slower.

2h has the best reach as you've said but has lower forward movement.
It's the safest to use on certain bosses and crucible knights due to the lower animation commitment between attacks. Better to use for bosses with jank hitboxes like ancestral spirit, queen, and if you don't want to manually aim, kindred, avatar, and 3dog from the front.

But it also uses substantially more stamina. webm related
Obviously regens less stamina (if you're using the relic)
and triggers every successive attack slower and less often

In my opinion,
It's a tool you use depending on hitboxes and moveset
Not really a replacement.