Alpina vs. Beemer M
if you are looking for power between these two, look no further than Bayerische Motoren Werke's in house tuning firm, M. Alpine seems somewhat more focused in adding style and some performance but they rarely go all out motor-wise.
Brabus vs. Benz AMG
hands down the winner here is Brabus. they are one of the biggest tuning firms for Mercedes products for a few decades now and they always produce pretty high power vehicles like the V12 powered E-class. as for luxury, they also offer in-house upgrades for the interior as well as the exterior of their cars. they are considerably more expensive than AMG, though
