The four Xpand X105BT's arrived today as scheduled. Won't be home yet for a few hours to test compatibility, but I did take some photos so you can see the comparison with the Samsung 4100GB.
1. The X105's are larger than the 4100GB. One can literally wear the X105's over the Samsung. Even so, they are still extremely light. But size wise, I think they may be way too large for kids 10 and under.
2. The X105 frame does a much better job at blocking stray light and reflections. The angle of the lenses seem to be identical between the two. The X105 lenses are slightly larger, and is a better shape than the rectangle that is the 4100.
3. The X105's are more comfortable to wear for me. They fit over the bridge of the nose much better. The 4100 nose piece is very shallow in comparison, resulting in some instability. Also, I can get the X105's closer to my face, which helps some more with stray light rejection.
4. The tint of the two look similar. Neither one seemed darker than the other either.
5. The box displays "Full HD 3D RF" logo--exactly the same as on the Samsung box. I have full confidence now that the X105BT will work with both my 55UT50 and 65VT50.
6. The larger on/off button on the ear/side of the X105 is very easy to use compared with the Samsung. It was difficult to avoid touching/smearing the lenses on the Samsung when you use the on/off button that is situated on the top of the lens. That's not an issue with the X105.
7. The large LED on the X105 is on the right side of the glasses and are much easier to see and provides fantastic feedback. The Samsung LED is the small on/off button which can make it a challenge when you also need to "press" it.
8. The sturdy X105 ears fold just past the bulky part that contains the battery/electronics/micro-USB port. Storage is much easier. The 4100 electronics and battery is on the bridge, which results in the shallow nose piece and also awkward on/off switch. The Samsung ears are flimsy and non-foldable.
The photos on Amazon's site for the X105BT are not 100% accurate. Go with the ones on Xpand's site. I would say these are practically identical to the "universal" X105 RF listed on Xpand's site. And at the current closeout price, probably difficult to beat for value unless the Panasonic's go on sale again for $30. I predict there'll be pretty popular soon, and I'm not sure how stock will hold up.