It may or may not has been clearly spelled out in this thread... LED lights is a new technology; they are getting brighter and cheaper very quickly. Generally, it is a poor investment UNLESS you use it daily and often. Bright corded LED portable LED work lights are around $30 (Costco pricing) to $50 (retail stores). Cordless are from $30 to $100, and prices / value ratio will likely continue improving.
"Better" or "Worth it" when applied to cordless lights strongly depends on the needs of the user - weight, size, brightness, how long it runs from a single charge, etc. I am sure it is a good light. However, Festool does not design or make LEDs, electronics, or Li-Ion batteries. It all is made in Asia, I bet. Festool just buys the components and marks them up by 10x or so using the strength of its brand name. The actual Festool's content is less than in its other tools which are actually designed by Festool from scratch. Other suppliers may buy the same components but mark them up by 2x or 3x and end up with a cheaper light. The rest are minor differences.
The number of LEDs means nothing. One can have 20 low power LEDs or one high power LED and get the same amount of light from them. It is a cost / design decision.