[svandamme]

both Started out at 1650 feet baro

The 63 went up to 2100 feet
the 51's stayed at 1650 ish

20 seconds later the P51es started their descend from 1625 to 500
And the P63 bit later started his steeper dive.

I'm not going to say that 500 feet climb is a lot, or a very high yoyo, in absolute altitude
its not like he reduced to 0 knots and did a hammerhead over the top,
but went higher and lost speed
and then dove and regained speed.

it spaced them out , that's the point of the high yoyo

end speed P63 219 knots
P51 did 229 on that track at that time.