Ok so I have 3 different batteries sets now.
after 3 identical timed 2 minute runs, all within 30 minutes of each other on same wind and water conditions.

Using Leo 2200kv motor, hobby wing 180A esc, M445 prop
Here are the findings:
.................................................. ................................................ MPH....Temp....Replaced mah
2 Turnigy nano-tech 4500mah 4S 45~90C Lipo Pack............................ 48.3......123.........4650
2 Turnigy nano-tech 5000mah 4S 65~130C Lipo Pack...........................53.8........98..... ....4480
2 Turnigy(blue) 5000mAh 4S 40C Lipo Pack........................................ 47.5......118.........4583