E13 guides are better period. If you set-up an e13 guide correctly with an E13 g-ring there is very little friction.(no more than mrp) The composite bash guard on an E13 is stronger and slides intsead of digging or bending like mrp's two thin metal guards. And the E13 is lighter.
I'd been running MRP guides for a couple years now and they work pretty good most of the time, but the inner guide ring couldn't clear on many frames. So, I made some nylon guides for the top/bottom of the boomerang and that pretty much sucked.
I got my E13 06 STS yesterday and let me tell you - immediate inspection really blows me away. Its very well designed and manufactured and I can't wait to get the new frames welded up so I can mount the thing (ISCG05 too!)
e13 gets my vote (well, I have yet to ride it...)
where we ride, it's not just rocky. it's rock. iv'e run an mrp for yrs. now. i'm tired of the constant un-bending and de-burring. i'll be switching over to the e-13 before we start riding again in the spring.
Both are nice, as far as bashguards go e13 hands down, ground clearance also goes to e13. Less resistance I feel the MRP is a little better and noise the MRP is quieter. I use an MRP on my DH bike, an e13 SRS on the DS bike and a e13 DRS on the trailbike.
I raced on an E.13 two years ago, and an MRP this last year. They both worked fine while just riding, but the Bash guard on the Evil definantly woked better for MY style of riding. I recently had a big crash, and my MRP is pretty screwed up. Instead of spening the time and money to fix it, i'm going to buy an SRS instead
Since early last summer, I've been using an e13 SRS. The chain has yet to fall off. I love the bashguard. Instead of catching/bending like an mrp could, it just slides over something w/o even a dent. The e13 are really solid.
I haven't owned an mrp, but i've ridden them. I have heard of mrp's bending. I don't see that happening to an e13.
...I ran an MRP System 1 on my old Big Hit, and have the new System 3 on my Demo 8, and I love it. It takes just a little bit of adjusting to get the spacing right, but after that, it's pretty much bombproof.
As for weight, believe it or not the standard aluminum bash ring weighs less than the polycarbonate one. I had my bashring put on the water-jet machine to get rid of a lot of excess material on the inside radius between the spider bolts.
E.13 is the better option i didnt drop a chain all season!!@%! Only thing i have against the guide is its a little loud (rubs on the plate) But i could fix it if i wasnt lazy. Go E.13 only bike company that has ever emailed me back within the hour CRAZY!%^#
What ever you read
The Gamut is one of the best guides on the market if not the best.Its easy to set up for 1,its bloody light and takes a beating unlike any other guide I have used and they weight only 260g(P40 polycarbonate bashguard) which is pretty impress if from such a good guide.
MRP offers so much more.. Just look at the options, hyper lite carbon race guides, super strong polycarbonate fusion guide (that wont break if tighten the bolts), the original CNCed guide (still 1/2lb lighter than E-13. Not to mention they just hired the guy I see at all the nationals to handle cust. service calls. Dude, hands down MRP. Oh yeah, I have heard that E-13 only gets some of the Big riders from MRP by offering large sums of money.....