The brightness is very comparable between the OEM LED and OEM xenon.
For the feeling, there is not much difference between them.
The long story:
Officially, the xenons are rated somewhere at 2400 lumens I believe. The LEDs are below 2000 lumens, so the xenons produce about 20% more light.
(officially, the LED headlights don't even require AFS or headlight washers in most countries).
Part of this difference in lumens is the color of the light. The LED headlights produce very white light (somewhere around 5000k), whereas the xenons have clear yellow part (4300k).
The yellow is better for visibility, since the human eye is better at 'seeing' yellow light. The lumen scale is corrected for the sensitivity of the human eye.
The light pattern of the xenons is also different from the LED headlights.
Xenon:

(this is not Polo, but for reference)
LED:

(again, not polo but reference)
This difference is because the xenons have projector lenses and the LED headlights are with a reflector lens, like halogen.
A big advantage is the static cornering lights in the 6R bi-xenon.
Are the LED headlights worth double the price, if you retrofit them? No. They hardly give any extra light (if any) But they still look sexy
Currently many people don't like it when someone with LED headlights drives behind them. I'm not sure why, but i guess they can be blinding.
Also, if you overtake someone, the right part of the beam can be very blinding for the person you overtake.
My own headlights are set at an inclination of -1%, as they should and with AFS system, and still people flash at me in opposite traffic and also when I overtake.
Maybe too bright or still blinding? I don't know but it's something to take into account.