No.
The bump case was announced long before UAG was a product. I've owned the UAG which is only cosmetically utilitarian. UAG looks really cool. My first one had a faulty button which put slight pressure constantly on the power button. I kept wondering why my phone had trouble powering down or would power up inexplicably. By the time I figured out the problem the damage was already done and eventually my power button no longer worked. If I wasn't still covered by Apple Care I would have gone after them for a replacement phone. For my troubles they sent me another case.
Still being enamored with the look of the UAG I bought one when I upgraded to the iphone 5. After a month the materials started to separate. It seems they join dissimilar materials along regions of stress.
In short UAG is just a pretty face. It's cheaply made and overpriced.
The Magpul case, like their other products, are made to a higher standard. It sounds sound like fanboy-speak but it's literally true. It's a purposefully designed and perfectly fitting case that endures. It's also priced reasonably.
I really, really loved the looks of the UAG but it's really a cheap product. It's not in the same league with the Magpul.