The "K" is mostly how plants look to you.
The "spectrum" is how much of different light wavelengths (red, blue, etc) is visible to plants.
The PAR is roughly how much energy the plants get.
The last two is what really important to plants.
I say if you like your current LED bulb, then keep it.
If overtime the plants start not looking that great to you, then post pictures and go from there.
Courtesy * Integrity * Perseverance * Indominable Spirit * and Self Control
Tenets of TKD