Taking some info from Spatula's AHII Aircraft Performance charts...here's some info for the Spit 16 vs. Spit 14.
Spit 16 speed @ sea-level = 316 mil/ 342 wep
Spit 14 speed @ sea-level = 334 mil/ 361 wep
Spit 16 speed @ 5k =336 mil/ 362 wep
Spit 14 speed @ 5k = 358 mil/ 386 wep
Spit 16 speed @ 10k = 358 mil/ 385 wep
Spit 14 speed @ 10k = 385 mil/ 410 wep
Speeds increase and decrease with Alt. Point being the Spit 14 is superior to the 16 at all alts as far as speed goes.
The Spit 16 has better acceleration through 5k and the 14 begins to accelerate better around 10k and up.
Climb rates:
At sea level the Spit 14 and 16 climb at the same rate with full military power. 3,684 ft/min The 16 holds this CR up to 11k. The 14's CR increases with Alt from 3,684 ft/min at sea-level steadily increasing to 3,845 ft/min by 11k. Climb rates for both A/C start to drop off from there. Where the Spit 16's CR actually increases and surpasses the 14's substantially from 16k to 24k whereas the 16 will out-climb the 14. Below 14k, with wep, the 14 has wicked CR from 4,920 ft/min at sea-level, 5,025 ft/min at 5k and 5,70 ft/min at 8k dropping off from there.
So, from this info, it can be determined that the Spit 14 is far superior to the Spit 16 in both speed and climb rate Superior climb rates up to 14k and then climb rate 21k to 30k. Between 14k and 21k, the 16 is better. The 14's speed however is superior through all alt's.
The Spit 16 on the other hand has better turn rate, sustained turn rate and tighter turn radius over all than the 14.
Clearly, the 16 is a formidable opponent for the 14 in a mid/low alt turn fight. The 14 has better flat out speed,climb and acceleration and should take the fight vertical and high. BnZ would be the way to go with a 14 vs 16. The 16 should keep it TnB style. Hope this may clear up the Spit 14 vs 16 questions. Please feel free to add any further inf if you have it.
SALUTE A8Chewey