I think that's a good contention, but the Spit XIV is no slouch, either.   I wonder at what altitude it's best performance occurs?
Seem's strange to suggest that a Jug will out manuever the Spit XIV, doesn't it?   But, I did put them at 30,000 ft.   So if they both know what they are doing, the Spit driver should spiral dive to a lower altitude, right?  And of course the Jug driver would follow, and have plenty of E (prolly more than the Spit) when he got there.   Now, have the tables turned?