If the lamp is dimmed, then it should last longer, otherwise I wouldn't expect there to be a significant difference. It will be the same as anything else. A crap lamp, with overpowered LEDs and inadequate cooling won't last as long, as one with under-driven LEDs and excellent cooling.
I would thought going for as higher lumens per watt as possible, would result in longer life, because less heat will be produced and the LEDs are more likely to be under-drive, as efficiency is higher, at lower current densities. The lamps discussed in the original post have a similar lumens per watt, which isn't great by today's standards. I would recommend looking for something more efficient.