After using the mini S4, S5 mini ... That I have successively broken and lost, I just equip myself of this model for a much more reasonable cost: My purse was somewhat biased by my awkwardness and my inattention ...
Since I use (about 15 days), I'm still looking big differences between the mini and the mini S4 S5.
On paper, it is a priori, "day and night": That's what is written on the records these phones.
In the reality of my daily use, I do not see anything so different:
Fluidity, responsiveness, screen quality, ergonomics, general storage capacity (with addition of a SD card), made photos and videos, 3G network speed / 4G, wifi, bluetooth, battery life, audio quality and emission reception ...
In short, there certainly are differences (at least I hope seen the price difference), but I personally did not see anything except insignificant details like, for example, the fact of not having backlight on both buttons surrounding the central button at the bottom of the phone.
Extremely satisfied with this model at this price in relation to these qualities! ... With the deep sense of myself is "having" (not to say anything of much coarser) with my previous models of this brand.
Kind regards,
Eric Manegat