i personally have not used talika before, so i cannot speak for that half, but i DO have the ardell one.
i've used it for a lil more than a week, and i do see results. not HUGE dramatic ones, but enough where i see something happening. plus, it actually, in my opinion, makes a great mascara base. my mascara seems to go on smoother when i have the ardell on.
since i have a biased point of view on this, i'd recommend the ardell because it's merely $4, which is definitely not a lot of money to try for.
for my brows, i do see a difference in that my hair isn't necessarily a lot thicker, or at least not yet (i hope), but i do see some hair has grown back quicker from where i accidently plucked the wrong hair. but i do see the super thin ones gotten thicker where you can actually see them now.
for the lashes, i do see more lashes, but overall for thickness, length, etc, i don't see any dramatic results. i am REALLY hoping to see them though! i only see enough results in the lashes to say the ardell actually works. but then again, i've only used it so far for a little more than a week, so i shouldn't expect such huge results in a small amount of time.
i hope that helped!