So the one you linked to doesn't list the full upc number, so I can only look it up by model number to compare.
And the model number of both of these pistols is Model
91220. So judging off of that info it would appear they are the same exact gun. The price difference is likely because they come from different distributors, and buds cost is different to stock from each distributor.
Or it could be someone on buds web design team made an error in entering the info, but because there's no upc for the 1st one I can't look up exact details.
There are different variants available of the shadow 2 (DA only, DA, SA, etc..) but without more info on the less expensive one I really can't draw a definitive comparison.

Reneirio, they are the same gun. They are both model 91220. Have a great day!

Reneirio, they are the same firearm. When a difference is listed in the title(such as added number/character or missing number/character) it creates a separate listing for the same firearm. Since the listings may have a different number of each in stock, just get the usually lower priced higher stock one. Cheers and stay safe!