While it is possible to measure the brightness of a light in absolute terms, like lumens, it is difficult to do accurately (requires a large, calibrated “integrating sphere"). This doesn’t translate well to the real world, where the housing, direction, diffusion, color, motion, distance of the light, and perception of the human eye all have huge impacts on apparent brightness.
Lumens are useful when comparing light bulbs to exchange in the same lamp/housing to light up a room, but in most other applications, there are too many other variables to consider.
For example, a capsule light can draw over 600mA at 3.7V which roughly estimates to 150 lumens assuming typical 70% efficiency, however it is probably less due to other losses in the system.
Vision props go up to 1000mA, so in theory they could be 60% brighter, but only when all the LEDs are on full at the same, and it is much more spread out.
Honestly, they both look about the same. If your main consideration is the perceived brightness to your audience, the bigger the better: go with the pop'n flow poi!
We offer 2 options for the pop'n flow poi rigs which you can check out here: