Luxray vs Ampharos
Luxray Pros :
Good Attack
Good Speed
Intimate to cripple phyical sweepers - HA is good with a status condition
Elemental Bites for Coverage
Looks cooler (in my opinion)
Cons :
A little on the fragile side compared to Ampharos
Not the most diverse moveset in the world
Ampharos Pros :
Awesome Sp.A
Pretty bulky
Diverse Moveset
Static for a chance to paralyze
Ampharos Cons :
Bad Speed
HA is meh
(Doesn't look as cool as Luxray)
Conclusion
They both have their own roles on a team.
Luxray is a Phyical Attacker whilst Ampharos is a Sp.A
Both Static and Intimidate can be used to a good cause.
Luxrays HA also Guts can be useful with Status moves.
However Ampharos HA is a little unimpressive
Luxray as Phyical and Ampharos as Sp.A depending in what you need