On personal experiences, I found out the Silicone cases aren't durable, snapping your phone a few times in & out is damagung the case pretty badly, it's likely going to chip off, my friends one also broke a few days ago, just by popping the case of the phone he lost a whole volume rocker (from the case itself) at the side, now there's just a hole and a nude volume button.
The Silicone Case has an unseen vivid shade of red, so it's great to show off and your phone will be pretty attractive, also have to say the Leather Case in PRODUCT(RED) ages beautifully over time, the borders will darken and the more it ages, the more premium it looks like (in my opnion at least). The Leather ones are also more flexible so less likely to break or whatever, although I guess the Silicone Case offers just a little bit more of protection and grip over the Leather Case. I wouldn't look at the $5 difference cuz these are totally diffirent cases with their own pro's and con's, I'm sure you'll like one more over the other, make sure to enjoy the one you pick!