Watts per foot answers a different question
Watts per foot is consumption, not brightness. It sizes the supply and hints at how much heat the run produces, but says nothing about how well lit the surface will be. Two products drawing the same watts per foot can deliver noticeably different lumens per foot.
Read both fields together. If one product publishes higher lumens per foot at the same watts per foot, that is the comparison worth having, and only when both figures come from the published specifications for the exact items.
Color quality has to be compared like for like
CRI is only comparable when both products state it at the same color temperature. A warm and a cool version of the same family can publish different values, so match the temperature before matching the number. Where deep reds matter, check whether an R9 figure is published for both.
Color temperature needs matching too. A 2700K product against a 4000K one is not a comparison of quality but of two different intended effects. Set the temperature you want first, then compare within it across the LED strip range.
Voltage, density and the physical fields
Voltage is a compatibility field before it is a comparison field. A 12V product and a 24V product each need a supply of their own voltage, never crossed, so a comparison that ignores voltage is comparing two different systems.
Density and format matter for appearance rather than raw output. COB and SMD both span a wide output range at LED Club, so the choice turns on delivered light, viewing distance, channel depth, diffuser type, density and control options, judged per product rather than by a rule about which format is visible. Density influences how continuous the light looks at close range, but it interacts with depth and diffuser, so it cannot be read alone.
IP rating, stated exactly on both sides
Compare the exact IP ratings, not the word attached to them. One product rated for occasional splashes and another rated for immersion are not interchangeable, and a general waterproof label describes neither. The rating also applies to the strip alone: every joint, seal, enclosure and fixing method in the chain has to be right for the location, and code applies too.
If one publishes a rating and the other does not, that is a difference in itself. Treat the missing field as unknown rather than assuming parity.
Cut interval, maximum run and channel fit
These three decide whether a product can physically do the job. A finer cut interval gives more length options on short legs. A longer published maximum run means fewer feeds on a continuous stretch. Tape width has to sit inside the internal dimension of the housing, and that is the number to compare, not the housing's outside size. A house product such as the LEDClub 24V COB 300 Series publishes all three (verify before ordering).
LED strips get warm in use. A channel helps dissipate heat and improves the finished look, and although it reduces the appearance of dots it cannot guarantee removing them, since density, depth and diffuser each contribute. Being optional, it belongs in the system you are comparing rather than serving as a fix for a weaker product. Items in the channel and profile range publish their own internal widths.
Why a photograph proves nothing
Product photography is shot with a chosen exposure, white balance and lens. Two identical strips can be made to look warm or cool, dotty or continuous, dim or blinding. A photograph cannot show lumens per foot, CRI, or how the run will read at your viewing distance.
The same caution applies to a video shot in a dark workshop. Nothing in that frame is measured. For a visual comparison, put both products in the same channel, at the same distance, powered at the same voltage, and look at them together. Otherwise work from the specification sheets and our guide to reading an LED strip spec sheet.
