Review and Comparison of MotoTec 48v 1500w Pro vs Razor MX650 (36v 650w) Dirt Bike

Review of MotoTec 48v 1500w Pro VS Razor MX650 (36v 650w) Dirt Bike.
Hopefully this is helpful for those looking for more info about this model.
Purchased from: bigtoysusa.com/
Rider Sizes:
Matthew - 12yrs old; 5'7"; 145lbs
Michael - 10yrs old; 4'7; 120lbs
Top Speed Run:
23.3 mph = Mototec 48v1500w (Matthew)
23.3 mph = Mototec 48v1500w (Michael)
17.6 mph = Razor MX650 (Michael)
17.5 mph = Razor MX650 (Matthew) *his mass helps get higher top on declines, but overall averaged similar to mikey
15.1 mph = Razor MX650 (Dad)
Timed Runs: (.71mi distance w/ small hills)
1:57 = Mototec 48v1500w (Michael)
2:00 = Mototec 48v1500w (Matthew)
2:31 = Razor MX650 (Michael)
didn't have Matthew ride Razor for comparison
Tire Sizes:
3.00-12 (rear) *my measurement 18" outside dia = Mototec 48v1500w
2.5x10 (rear) *my measurement 15.5" outside dia = Razor MX650
2.50-14 (front) *my measurement 19" outside dia = Mototec 48v1500w
2.4x16 (front) *my measurement 16.5" outside dia = Razor MX650
Seat Height:
27" = Mototec 48v1500w
22" = Razor MX650
Seat Width:
3.5-4" = Mototec 48v1500w
3.5-5" = Razor MX650
Handle Bar Height:
~36" = Mototec 48v1500w
~33" = Razor MX650
Length:
~59" = Mototec 48v1500w (Matthew)
~53" = Razor MX650
Clearance: *lowest point sitting dry weight
10.5" = Mototec 48v1500w
5" = Razor MX650 *kickstand bracket
Runtimes:
*haven't tested yet
Mototec 48v1500w has 48V10Ah Lithium Battery (1x Battery - model unknown until I open up)
Razor MX650 has 36V15Ah AGM Battery (3x Battery UB12150)