I purchased both of them, and both are dimmable according to packaging. There are 2 stickers on their boxes, one of those stickers is identical and says this is a dimmable 620nm-660nm bulb. The other sticker appears to be related to their Amazon pages, and hence different.
These bulbs are not the same though. The cheaper one is orange, the more expensive one is pinkish red. Both bulbs have clear glass, the color is coming from the filament.
I compared them to my SST-20 Deep Red D4V2 flashlight. Light from the pinkish red bulb is pleasant, but it is clearly not monochromatic. It is probably phosphor-converted red. There is a hint of blue color on blue-colored objects, but it is barely visible. There doesn’t seem to be much green.