Watches

Style.

If you are making a traditional dive watch, then sure, there are many brands loading up on lume that is comparable.

Other styles however? A lot just comes down to aesthetics - a lot of styles just won't suit such big, bright hands, so a field or pilots watch with much thinner, framed hands will naturally glow less. Similarly a brand that is a bit more particular about colour may want lume that is more of a neutral white in daylight rather than the greenish hue of a Seiko.

There are also brands who just don't prioritise lume and will save a few pennies on the build cost bynsoecxing something generic and basic rather than searching out a superluminova or equivalent