I own and use both.
^ Top from left: Bark River Bravo Necker, Becker BK-11, Swamp Rat Swamp Warden, ESEE/Rat Izula (does not come with pollished blade BTW)
Here's a pic of their sheeths....
Here's my take on these guys...
Becker = best price, largest blade, nifty bottle opener, optional TDI clip makes it great for non-neck carry. -it is a bit large for neck carry though, and yet the handle is a bit smallish, also the 1095 steel is OK but seems to have the worst edge retension of the four.
Izula = smallest/most compact in factory sheeth for easy neck carry. -great overall knife but not quite the best at anything compaired to the others. IMHO.
Swamp Warden = my favorite steel of the lot, SR-101 is awsome, strong and holds an edge extremely well. this one has the longest handle which is good for comfort but makes it longer overall (obviously) ...yet I find that it's still pretty comfy for neck carry. - more expensive than the previous two.
Bark River Necker = compact, comes with fully convexed blade with satin pollished cutting surface, only one with stainless steel, has the nicest handle scales option, sheeth accommodates scales and holds a fire steel. - with handle scales it's the most expensive of the four.
It's a close one, but for me I have to say the Bravo I is my overall favorite for neck carry, The Izula is a bit more comfy WITHOUT scales do to the nicely rounded butt, but with scales the Barkie is nice. Also with the BR sheath rattle... that isn't a problem if you use the scales and/or firesteel.
Here's a few more pics of both knives..... Izula pictured is after I sanded off the blade coating....
Here's everything my Bark River Necker came with, (minus the bill, that was just for size refference)...
-Keep in mind that ESEE offers a pretty cool basic survival pack set for the Izula too, and it is a great little knife as well.