ES use manual clutch..just like yamaha 125 and most big bikes..
normal or SS(supersport) have auto clutch..

performance wise,if u can handle the clutch well,the bike will perform better on acceleration..fuel consumption,negligible,not much differ
on the left hand side,ES u will see the clutch lever, SS no clutch lever
Foot rest and gear shifter also different..and the way u shift gear also different

Rider FootRest
- ES come with spring and fold-able (in event of bike lean to low or dropped)
- SS fixed

Gear Shifter
-ES gear shifter is only one sided (front only,like the big bikes one) and rubberized
-SS gear shifter have front and rear..like ex5..

Gear Shifting
-ES gear shifting down to 1st gear..then u pull it up to 2-3-4
-SS all down 1-2-3-4

The ES v2 is 5 speed version, with diaphragm carb. All others use round slide carb with accelerator pump. Empirical data suggests diaphragm carb is more fuel efficient, mainly because of the accelerator pump on the round slide carb.

ES v2 has wider rims and rear disc brake.