I'm not a dealer but the basic alpha has cheaper sprung shocks and the same headlight you have and only in pull start. Not sure if it has the 1 inch windshield or the 19 windshield. I would have to look at the picture.
The next silver alpha has 1 inch windshield, led headlight and float qs3 shocks. The front track shock is not a float. Can be ordered in electric or pull start.
The alpha hardcore comes in red or green. Has extruded edge on running boards, led headlight, short windshield, beefed up tail section and comes in pull or electric start. You can only get the green one with electric start and only on the 165. Not the 154 which makes no sense to me. The hardcore also has sprung qs3 shocks.
The rest is the same.