I've got a Gladius (had one of the first to hit the streets in the UK)and it is a fantastic light. IMHO the non-technical types wont have any trouble getting to grips with the Gladius's tail switch which is very intuitive. (if you can push a button you can master the Gladius, it's that simple!) The Beam characteristics for a LED are nearly perfect. Great Hotspot with good sidespill.The 3 watt LED (in theory at least) should last longer than the U2's 5 watt LED.The Ability to ramp up and down the light's beam intensity gives a range of options comparable to the U2. The aesthetics are nice and make the handling of the light easy and secure in the hand. The ability to attach different types of Lanyards, as Ken suggests, exists at two points on the tail flange.
The warranty issue, is as stated, unproven. However, I've no reason to doubt BHI's commitment to good customer service and this will be a wait and see question.
The only thing I've had any doubts about on the Gladius is the ceramic finish.As far as I'm concerned the jury remains outat the moment, with some members of British Blades reporting that it doesn't wear as well as coventional HA111.
However, I've never come across any military equipment that I've used which was made of aluminum and coated in a matt surface wear any better than the Gladius. We are talking chips and marks here not wholesale paint loss!
The U2 has a head start on the Gladius as it has been on the market for some time now. However, it has had quite a few teething problems with switches and beam shape and colour.
Unless the Gladius is reported to have any other type of problem then the fact that Surefire fix things quickly doesn't mean anything to me as it shouldn't be necessary to fix the U2's which are out there at this juncture anyway?
Dont get me wrong I love Surefire gear and the stuff they produce is fantastic and the company stand behind their products. The lifetime guarantee is definitely worth having as it eliminates the worry about how to fix something after it becomes outdated. However, we all pay for the guarantee so it isn't exactly a kind benevolent act on Surefire's part is it?
IMHO opinion the U2 is not made for the same type of duty uses that the Gladius was designed for. The U2 is much more of a 'Jack of all trades and master of none' than the tactically orientated Gladius. The Gladius can and does make a good general purpose light but perhaps not in the same manner that the U2 does.
In conclusion the U2 and Gladius are both fantastic products. Both CAN be used in ways not envisioned by their makers but both have particular characteristcs which make comparisons unfair!
Doug