You really can't tell a difference among the two I would think. Basically it boils down to what you want more, money, installation considerations, etc....
The bandit is a m50 basically if I recall. The ti600.2 will give you extra power with a fan built into it.
Head Unit: Eclipse CD5000
Amp1: Ti 500.4
Amp2: MPS2500
Crossover: Audiocontrol 6xs
High/Mids: ID CD1-E v1 Horns
Midbass: IDQ 6.5 v2
Subs: IDQ 12 v1
EQ: PG EQ215-X
both have power to spare and are amazingly clean, go with which one fits your budget, installs easier and looks better with your other gear. the fan on the ti might make it better for an upside down or undercover install, while the m50 is much smaller.
my ex-girlfriend said "its car audio or me"
i've had tougher choices at a soda machine...