Here's a few more for relative size:
The tallest one in the middle is the marmit vinyl figure at about 23"-- one inch shorter the the kenner jumbo above.....
The neca is, of course, 22" and the Roswell by yoshihiko sano ( based on Giger's original sculpt like the marmit) stands roughly at 18" which is about the same height as the original kenner.....
Although both the marmit and Roswell are based on the original production statue by giger based off of bolaji's form, the design excludes certain elements found on the final suit which was born out of practicality or additional aesthetic flourishes:
Wrist ribs to hide the seams of the gloved hands
Attached er rather paired fingers to eliminate jello digits between the thumbs
Elbow spurs instead of the three circles also found on the hips)
The midsection ribs to hide the actor where the suit separates
The marmit, however, incorporates the wrist ribbing details and the elbow spikes...
The only licensed toys to incorporate the thorax rflat ribs seems to be the kenner, including the funko/ super7 ReAction figures and the Gentle Giant Jumbo ( that said, also the tsukuda based on the kenner). Although I don't remember if the sega has this detail or not, I'll have to double check