Meteor 4 steady modes, 4 flashing modes Mode memory function Day flash mode Quick release unversal bracket fits all round and AERO style bars Mode indicator Battery capacity and charging indicator Automatic fully charged cut-off system High precision optical lens Water Resistance (IPX 4) Comet-x 3 steady modes, 4 flashing modes CNC Aluminium heat sink casing Auto safe mode Mode memory function Quick release universal bracket fits all round and AERO style bars) Low battery, charging and fully charged indicator Automatic fully charged cut-off system Side visibility Water resistance (IPX 4)