Differential protection

[Mudder]

I've wanted to add some differential protection to my truck. The three vendors I'm looking at are; Marlin Crawler, All-Pro Off Road, and Ruffstuff Specialties. I'm wonder what you guys think. I like how RuffStuff's is basic and looks like it does the job but I'm wondering if All-Pros or Marlin's is better since it's a full face. Marlin's is $69, All-Pro's is $59 and RuffStuff's is $33. I have no problem paying more but if I don't need the full face protection then why pay extra for it? I've attached the three I'm looking at as well.
Marlin's

All Pro's

RuffStuff's

 

[KLF]

8" pipe cap, cut in half. One on each axle. BEEFY.

Cutting in the band saw:

Front axle:

Rear axle:

That was in 2001. In 2003 I shaved the bottoms of both axles, removed the drain plugs.

 

[ntsqd]

Not a hard core crawler, just wanted to keep a rock from dinging the thin front face & mashing into the ring gear. Used 10 ga. Core-10 and built this a very long time ago: