The Daymakers are definitely a better headlight in terms of fit and finish.
I recently purchased a set of Chinese bulbs, 2200 lumens that are working well, after some diligent tweaking. The problem with all of teh Chinese bulbs is that they are not a true H4 bulb. There is a small tab that is punched out on the bottom center of the H4 bulb that fits into a slot in the RG mount. With this tab missing the Chinese bulbs will still move around a bit. Also the dust boot will not go on, without modification, behind the bulb like it should.
My solution was to fit a piece of rubber from a rim strip over the stem of the bulb. I then put the plastic retainer on the bulb, and sandwiched the rubber strip between the retainer and the back of the reflector housing. I had to trim down the inner ring on the dust boot to get it over the back of the bulb, and cut it so that it would fit on the bulb. A piece of duct tap made it whole again.
I have to say that this is the best lighting that I have ever had on this ride. I truly can see again after being in the dark.